diff --git a/lerobot/scripts/visualize_dataset.py b/lerobot/scripts/visualize_dataset.py
index b339fe775..676a4a925 100644
--- a/lerobot/scripts/visualize_dataset.py
+++ b/lerobot/scripts/visualize_dataset.py
@@ -79,8 +79,8 @@ from lerobot.common.datasets.lerobot_dataset import LeRobotDataset
 
 class EpisodeSampler(torch.utils.data.Sampler):
     def __init__(self, dataset: LeRobotDataset, episode_index: int):
-        from_idx = dataset.meta.episodes["dataset_from_index"][episode_index].item()
-        to_idx = dataset.meta.episodes["dataset_to_index"][episode_index].item()
+        from_idx = dataset.meta.episodes["dataset_from_index"][episode_index]
+        to_idx = dataset.meta.episodes["dataset_to_index"][episode_index]
         self.frame_ids = range(from_idx, to_idx)
 
     def __iter__(self) -> Iterator:
@@ -283,7 +283,7 @@ def main():
     tolerance_s = kwargs.pop("tolerance_s")
 
     logging.info("Loading dataset")
-    dataset = LeRobotDataset(repo_id, root=root, tolerance_s=tolerance_s)
+    dataset = LeRobotDataset(repo_id, episodes=[args.episode_index], root=root, tolerance_s=tolerance_s)
 
     visualize_dataset(dataset, **vars(args))