|This article is about the actor. You may be looking for the Comic Series character, or the Social Game character.|
Witwer has made appearances on shows such as:
- Cold Case
- Battlestar Galactica
- Star Wars: The Clone Wars
- Being Human (US Version)
- Star Wars: The Force Unleashed (Voice)
- Sam was supposedly reprise his role as the walker in the tank in Season 2. He would be the main cast for the two first episodes of the season and it would be like the Twilight Zone episodes, where the main characters, like Andrea and Amy would be seen as cameos. Sam's character would get bit and his death would be depicted, thus explaining how Atlanta fell. However, due to Darabont getting fired by AMC at the start of Season 2, the idea was never filmed.