diff --git a/scripts/local_testnet/beacon_node.sh b/scripts/local_testnet/beacon_node.sh
index 940fe2b8581..c78edbb26ab 100755
--- a/scripts/local_testnet/beacon_node.sh
+++ b/scripts/local_testnet/beacon_node.sh
@@ -11,10 +11,13 @@ source ./vars.env
 SUBSCRIBE_ALL_SUBNETS=
 DEBUG_LEVEL=${DEBUG_LEVEL:-info}
 
+lighthouse_binary=lighthouse
+
 # Get options
-while getopts "d:sh" flag; do
+while getopts "d:b:sh" flag; do
   case "${flag}" in
     d) DEBUG_LEVEL=${OPTARG};;
+    b) lighthouse_binary=${OPTARG};;
     s) SUBSCRIBE_ALL_SUBNETS="--subscribe-all-subnets";;
     h)
        echo "Start a beacon node"
@@ -24,6 +27,7 @@ while getopts "d:sh" flag; do
        echo "Options:"
        echo "   -s: pass --subscribe-all-subnets to 'lighthouse bn ...', default is not passed"
        echo "   -d: DEBUG_LEVEL, default info"
+       echo "   -b: lighthouse binary name, default is lighthouse"
        echo "   -h: this help"
        echo
        echo "Positional arguments:"
@@ -44,15 +48,14 @@ quic_port=${@:$OPTIND+2:1}
 http_port=${@:$OPTIND+3:1}
 execution_endpoint=${@:$OPTIND+4:1}
 execution_jwt=${@:$OPTIND+5:1}
-
-lighthouse_binary=lighthouse
+testnet_dir=${@:$OPTIND+6:1}
 
 exec $lighthouse_binary \
 	--debug-level $DEBUG_LEVEL \
 	bn \
 	$SUBSCRIBE_ALL_SUBNETS \
 	--datadir $data_dir \
-	--testnet-dir $TESTNET_DIR \
+	--testnet-dir $testnet_dir \
 	--enable-private-discovery \
   --disable-peer-scoring \
 	--staking \
diff --git a/scripts/local_testnet/clean.sh b/scripts/local_testnet/clean.sh
index cd915e470d6..bf79acfa945 100755
--- a/scripts/local_testnet/clean.sh
+++ b/scripts/local_testnet/clean.sh
@@ -11,3 +11,5 @@ source ./vars.env
 if [ -d $DATADIR ]; then
   rm -rf $DATADIR
 fi
+
+./clean_genesis.sh genesis.json
diff --git a/scripts/local_testnet/clean_genesis.sh b/scripts/local_testnet/clean_genesis.sh
new file mode 100755
index 00000000000..06bfee42fed
--- /dev/null
+++ b/scripts/local_testnet/clean_genesis.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+genesis_file=$1
+
+# Reset the `genesis.json` config file fork times.
+sed -i 's/"shanghaiTime".*$/"shanghaiTime": 0,/g' $genesis_file
+sed -i 's/"cancunTime".*$/"cancunTime": 0,/g' $genesis_file
+sed -i 's/"pragueTime".*$/"pragueTime": 0,/g' $genesis_file
diff --git a/scripts/local_testnet/download_geth_stale.sh b/scripts/local_testnet/download_geth_stale.sh
new file mode 100755
index 00000000000..2fef7bd4811
--- /dev/null
+++ b/scripts/local_testnet/download_geth_stale.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+# Get is cancun enabled for versions > 1.13.12. So we install 1.13.11.
+cd ~
+curl -LO https://gethstore.blob.core.windows.net/builds/geth-linux-amd64-1.13.11-8f7eb9cc.tar.gz
+tar xvf geth-linux-amd64-1.13.11-8f7eb9cc.tar.gz
+cd geth-linux-amd64-1.13.11-8f7eb9cc/
+cp geth ~/.cargo/bin/geth-stale # .cargo/bin to avoid permissions problems
+cd ~
+rm -r geth-linux-amd64-1.13.11-8f7eb9cc geth-linux-amd64-1.13.11-8f7eb9cc.tar.gz
diff --git a/scripts/local_testnet/download_lighthouse.sh b/scripts/local_testnet/download_lighthouse.sh
new file mode 100755
index 00000000000..ee1d5fa8f03
--- /dev/null
+++ b/scripts/local_testnet/download_lighthouse.sh
@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+
+# Download the Lighthouse version passed as the first argument.
+# OS is picked automatically using uname
+# Example:
+# $ ./download_lighthouse.sh v5.0.0 -b lighthouse-deneb -p ~/.cargo/bin/
+# ...
+# $ ls ~/.cargo/bin/
+# lighthouse-deneb
+
+version=$1
+shift
+
+install_path=~/.cargo/bin/
+installed_binary_name=lighthouse
+
+# Required commands check
+for cmd in curl tar uname; do
+  command -v "$cmd" >/dev/null 2>&1 || { echo >&2 "This script requires $cmd but it's not installed. Aborting."; exit 1; }
+done
+
+# Check OS and set binary_name accordingly
+OS=$(uname -s)
+case "$OS" in
+  Linux) binary_name="lighthouse-${version}-x86_64-unknown-linux-gnu.tar.gz" ;;
+  Darwin) binary_name="lighthouse-${version}-x86_64-apple-darwin.tar.gz" ;;
+  *) echo "Unsupported OS: $OS"; exit 1 ;;
+esac
+
+# Get options
+while getopts "b:p:h" flag; do
+  case "${flag}" in
+    b) installed_binary_name=${OPTARG};;
+    p)
+       install_path=${OPTARG}
+       # Ensure install_path ends with a slash
+       install_path="${install_path%/}/";;
+    h)
+      echo "Download Lighthouse."
+      echo
+      echo "usage: $0 vX.X.X <Options> "
+      echo
+      echo "The first argument must be the version of Lighthouse you wish to download,"
+      echo "specified as 'vX.X.X', where X.X.X is the version number."
+      echo
+      echo "Options:"
+      echo "   -b: binary name, specify the output binary name, default: lighthouse"
+      echo "   -p: install path, specify the installation path, default: ~/.cargo/bin/"
+      echo "   -h: this help"
+      echo "Example:"
+      echo "$ ./download_lighthouse.sh v5.0.0 -b lighthouse-deneb -p ~/.cargo/bin/"
+      echo "..."
+      echo "$ ls ~/.cargo/bin/"
+      echo "lighthouse-deneb"
+      exit
+      ;;
+  esac
+done
+
+# Download and extract the release
+echo "Downloading ${binary_name}"
+if ! curl -LO "https://github.com/sigp/lighthouse/releases/download/${version}/${binary_name}"; then
+  echo "Failed to download ${binary_name}"
+  exit 1
+fi
+
+if ! tar -xzf "${binary_name}"; then
+  echo "Failed to extract ${binary_name}"
+  exit 1
+fi
+
+# Remove the tarball
+echo "Removing downloaded tarball ${binary_name}"
+rm "${binary_name}"
+
+# Move the binary only if install_path is different from current directory
+echo "Installing Lighthouse to ${install_path}${installed_binary_name}"
+if ! mv lighthouse "${install_path}${installed_binary_name}"; then
+    echo "Failed to move Lighthouse to ${install_path}${installed_binary_name}"
+    exit 1
+fi
+
+echo "Lighthouse ${version} installed successfully at ${install_path}${installed_binary_name}"
diff --git a/scripts/local_testnet/fork_revert.sh b/scripts/local_testnet/fork_revert.sh
new file mode 100755
index 00000000000..80cade01ba2
--- /dev/null
+++ b/scripts/local_testnet/fork_revert.sh
@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+source ./start_local_testnet.sh genesis.json
+
+./download_lighthouse.sh v4.6.0 -b lh-stale
+
+n=2
+node_id=$(($BN_COUNT+1))
+
+stale_testnet_dir=$DATADIR/stale_testnet
+
+cp -r $TESTNET_DIR $stale_testnet_dir
+
+sed -i '/DENEB_FORK_VERSION/d' $stale_testnet_dir/config.yaml
+sed -i '/DENEB_FORK_EPOCH/d' $stale_testnet_dir/config.yaml
+sed -i '/MAX_REQUEST_BLOCKS_DENEB/d' $stale_testnet_dir/config.yaml
+
+for ((i = 0; i < n; i++)); do
+    current_id=$(($node_id+i))
+    execute_command_add_PID geth_$current_id.log ./geth.sh $DATADIR/geth_datadir$current_id $((EL_base_network + $current_id)) $((EL_base_http + current_id)) $((EL_base_auth_http + $current_id)) $genesis_file
+done
+
+sleeping 20
+
+for ((i = 0; i < n; i++)); do
+    current_id=$(($node_id+i))
+    secret=$DATADIR/geth_datadir$current_id/geth/jwtsecret
+    echo $secret
+    execute_command_add_PID beacon_node_$current_id.log ./beacon_node.sh $SAS -d $DEBUG_LEVEL $DATADIR/node_$current_id $((BN_udp_tcp_base + $current_id)) $((BN_udp_tcp_base + $current_id + 100)) $((BN_http_port_base + $current_id)) http://localhost:$((EL_base_auth_http + $current_id)) $secret $stale_testnet_dir -b lh-stale
+
+    execute_command_add_PID validator_node_$current_id.log ./validator_client.sh $BUILDER_PROPOSALS -d $DEBUG_LEVEL $DATADIR/node_$current_id http://localhost:$((BN_http_port_base + $current_id))
+
+    tail ~/.lighthouse/local-testnet/testnet/PIDS.pid --lines 2 >> $stale_testnet_dir/stale_pids.pid
+done
+
+# Wait for the two chains to split
+sleeping $(($DENEB_FORK_EPOCH*32*$SECONDS_PER_SLOT))
+
+echo "Sending a transaction on the stale chain"
+./transaction.sh
+
+sleeping 30
+
+./kill_processes.sh $stale_testnet_dir/stale_pids.pid
+
+sleeping 5
+
+for ((i = 0; i < n; i++)); do
+    current_id=$(($node_id+i))
+    secret=$DATADIR/geth_datadir$current_id/geth/jwtsecret
+    echo $secret
+    execute_command_add_PID beacon_node_$current_id.log ./beacon_node.sh $SAS -d $DEBUG_LEVEL $DATADIR/node_$current_id $((BN_udp_tcp_base + $current_id)) $((BN_udp_tcp_base + $current_id + 100)) $((BN_http_port_base + $current_id)) http://localhost:$((EL_base_auth_http + $current_id)) $secret $TESTNET_DIR
+
+    execute_command_add_PID validator_node_$current_id.log ./validator_client.sh $BUILDER_PROPOSALS -d $DEBUG_LEVEL $DATADIR/node_$current_id http://localhost:$((BN_http_port_base + $current_id))
+done
diff --git a/scripts/local_testnet/geth.sh b/scripts/local_testnet/geth.sh
index 5dc4575cf0a..aeb5bca4acf 100755
--- a/scripts/local_testnet/geth.sh
+++ b/scripts/local_testnet/geth.sh
@@ -3,9 +3,10 @@ set -Eeuo pipefail
 source ./vars.env
 
 # Get options
-while getopts "d:sh" flag; do
+while getopts "d:b:sh" flag; do
   case "${flag}" in
     d) DEBUG_LEVEL=${OPTARG};;
+    b) GETH_BINARY=${OPTARG};;
     s) SUBSCRIBE_ALL_SUBNETS="--subscribe-all-subnets";;
     h)
        echo "Start a geth node"
@@ -44,7 +45,8 @@ exec $GETH_BINARY \
     --datadir $data_dir \
     --ipcdisable \
     --http \
-    --http.api="engine,eth,web3,net,debug" \
+    --http.api="engine,eth,web3,personal,net,debug" \
+    --allow-insecure-unlock \
     --networkid=$CHAIN_ID \
     --syncmode=full \
     --bootnodes $EL_BOOTNODE_ENODE \
diff --git a/scripts/local_testnet/setup.sh b/scripts/local_testnet/setup.sh
index 419cba19ed9..d7a6016aa80 100755
--- a/scripts/local_testnet/setup.sh
+++ b/scripts/local_testnet/setup.sh
@@ -29,7 +29,6 @@ lcli \
 	--bellatrix-fork-epoch $BELLATRIX_FORK_EPOCH \
 	--capella-fork-epoch $CAPELLA_FORK_EPOCH \
 	--deneb-fork-epoch $DENEB_FORK_EPOCH \
-	--electra-fork-epoch $ELECTRA_FORK_EPOCH \
 	--ttd $TTD \
 	--eth1-block-hash $ETH1_BLOCK_HASH \
 	--eth1-id $CHAIN_ID \
diff --git a/scripts/local_testnet/start_local_testnet.sh b/scripts/local_testnet/start_local_testnet.sh
index be91d069985..05b2d7adef1 100755
--- a/scripts/local_testnet/start_local_testnet.sh
+++ b/scripts/local_testnet/start_local_testnet.sh
@@ -53,6 +53,7 @@ LOG_DIR=$TESTNET_DIR
 # user can "tail -f" right after starting this script
 # even before its done.
 ./clean.sh
+./clean_genesis.sh $genesis_file
 mkdir -p $LOG_DIR
 for (( bn=1; bn<=$BN_COUNT; bn++ )); do
     touch $LOG_DIR/beacon_node_$bn.log
@@ -66,8 +67,17 @@ done
 
 # Sleep with a message
 sleeping() {
-   echo sleeping $1
-   sleep $1
+    local sleep_time=$1
+    local start_time=$(date +%s)
+    local end_time=$((start_time + sleep_time))
+
+    while [ $(date +%s) -lt $end_time ]; do
+        local current_time=$(date +%s)
+        local time_left=$((end_time - current_time))
+        echo -ne "Sleeping for $time_left more seconds...\r"
+        sleep 1
+    done
+    echo -ne "\n"
 }
 
 # Execute the command with logs saved to a file.
@@ -128,15 +138,10 @@ done
 
 sleeping 20
 
-# Reset the `genesis.json` config file fork times.
-sed -i 's/"shanghaiTime".*$/"shanghaiTime": 0,/g' $genesis_file
-sed -i 's/"cancunTime".*$/"cancunTime": 0,/g' $genesis_file
-sed -i 's/"pragueTime".*$/"pragueTime": 0,/g' $genesis_file
-
 for (( bn=1; bn<=$BN_COUNT; bn++ )); do
     secret=$DATADIR/geth_datadir$bn/geth/jwtsecret
     echo $secret
-    execute_command_add_PID beacon_node_$bn.log ./beacon_node.sh $SAS -d $DEBUG_LEVEL $DATADIR/node_$bn $((BN_udp_tcp_base + $bn)) $((BN_udp_tcp_base + $bn + 100)) $((BN_http_port_base + $bn)) http://localhost:$((EL_base_auth_http + $bn)) $secret
+    execute_command_add_PID beacon_node_$bn.log ./beacon_node.sh $SAS -d $DEBUG_LEVEL $DATADIR/node_$bn $((BN_udp_tcp_base + $bn)) $((BN_udp_tcp_base + $bn + 100)) $((BN_http_port_base + $bn)) http://localhost:$((EL_base_auth_http + $bn)) $secret $TESTNET_DIR
 done
 
 # Start requested number of validator clients
diff --git a/scripts/local_testnet/transaction.js b/scripts/local_testnet/transaction.js
new file mode 100644
index 00000000000..7f5bda1f399
--- /dev/null
+++ b/scripts/local_testnet/transaction.js
@@ -0,0 +1,3 @@
+web3.personal.importRawKey('115fe42a60e5ef45f5490e599add1f03c73aeaca129c2c41451eca6cf8ff9e04', 'password')
+web3.personal.unlockAccount('0x7b8c3a386c0eea54693ffb0da17373ffc9228139', 'password', 3000)
+web3.eth.sendTransaction({from: '0x7b8c3a386c0eea54693ffb0da17373ffc9228139', to: '0x0000000000000000000000000000000000000000', value: 1000})
diff --git a/scripts/local_testnet/transaction.sh b/scripts/local_testnet/transaction.sh
new file mode 100755
index 00000000000..726c9aa42f6
--- /dev/null
+++ b/scripts/local_testnet/transaction.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+# Define the node endpoint
+NODE_ENDPOINT="http://localhost:6005"
+
+# Import the private key
+geth --jspath "./" --exec 'loadScript("transaction.js")' attach $NODE_ENDPOINT