diff --git a/pointblank/field.py b/pointblank/field.py
index da76005d3..2f0c84cf1 100644
--- a/pointblank/field.py
+++ b/pointblank/field.py
@@ -1941,7 +1941,7 @@ def duration_field(
         ),
     )
 
-    pb.generate_dataset(schema, n=100, seed=23)
+    pb.preview(pb.generate_dataset(schema, n=100, seed=23))
     ```
 
     Colon-separated strings can also be used for quick duration definitions:
@@ -1952,7 +1952,7 @@ def duration_field(
         break_time=pb.duration_field(min_duration="0:05:00", max_duration="0:30:00"),
     )
 
-    pb.generate_dataset(schema, n=30, seed=23)
+    pb.preview(pb.generate_dataset(schema, n=30, seed=23))
     ```
 
     Optional durations can be created with `nullable=True`, and duration fields work well
@@ -1972,7 +1972,7 @@ def duration_field(
         ),
     )
 
-    pb.generate_dataset(schema, n=30, seed=7)
+    pb.preview(pb.generate_dataset(schema, n=30, seed=7))
     ```
     """
     return DurationField(
diff --git a/pointblank/schema.py b/pointblank/schema.py
index 84df18deb..9ecaadba2 100644
--- a/pointblank/schema.py
+++ b/pointblank/schema.py
@@ -1821,7 +1821,7 @@ def test_age_range(generate_dataset):
         ),
     )
 
-    pb.generate_dataset(schema, n=50, seed=23)
+    pb.preview(pb.generate_dataset(schema, n=50, seed=23))
     ```
     """
     return schema.generate(
diff --git a/pointblank/validate.py b/pointblank/validate.py
index 62432a311..45d7375dc 100644
--- a/pointblank/validate.py
+++ b/pointblank/validate.py
@@ -90,6 +90,7 @@
     _format_to_integer_value,
     _get_fn_name,
     _get_tbl_type,
+    _is_duration_dtype,
     _is_lazy_frame,
     _is_lib_present,
     _is_narwhals_table,
@@ -2442,6 +2443,27 @@ def _generate_display_table(
 
     none_values = [(k, i) for k, v in none_values.items() for i, val in enumerate(v) if val]
 
+    # Cast duration columns to string for display since Great Tables cannot handle duration types;
+    # the original dtype labels are already captured in `col_dtype_dict` / `col_dtype_dict_short`
+    # so they will still show correctly in the column headers
+    duration_cols = [
+        col_name
+        for col_name, col_dtype in col_dtype_dict.items()
+        if _is_duration_dtype(col_dtype.lower())
+    ]
+    if duration_cols:
+        if df_lib_name_gt == "polars":
+            import polars as pl
+
+            for c in duration_cols:
+                vals = data[c].to_list()
+                str_vals = [str(v) if v is not None else None for v in vals]
+                data = data.with_columns(pl.Series(c, str_vals, dtype=pl.Utf8))
+        else:
+            # Pandas (and PySpark converted to Pandas)
+            for c in duration_cols:
+                data[c] = data[c].astype(str)
+
     # Import Great Tables to get preliminary renders of the columns
     import great_tables as gt