4 Season
166 Episode
Ben 10 - Season 4 Episode 14 Cosplay Day
Team Tennyson enjoys the biggest convention in town, but when a gawky costume store employee finds a familiar-looking helmet in the back of the store and tries it on, Ben is faced with the return of an old foe in a new form: Forever Knight.
- Country : United States of America, Singapore, United Kingdom
- Genre : Kids, Animation, Comedy, Action & Adventure, Sci-Fi & Fantasy
- Director : Duncan Rouleau
- Cast : Tara Strong, Montse Hernandez, David Kaye, Roger Craig Smith, Josh Keaton, John DiMaggio