Season
Season 4 Episode
- Season 4 Chicken In Chichen Itza Part 1: Pyramid Scheme
- Season 4 Chicken In Chichen Itza, Part 2: The Wages of Fear
- Season 4 Ben in Rome, Part 1: A Slice of Life
- Season 4 Ben in Rome, Part 2: The Bee's Knees
- Season 4 Gentle Ben
- Season 4 Funhouse
- Season 4 Summer Breakers
- Season 4 The Monsters in Your Head
- Season 4 Queen of Bees
- Season 4 Falls, Falls, Falls
- Season 4 The Greatest Lake
- Season 4 Mud on the Run
- Season 4 It's Story Time
- Season 4 Cosplay Day
- Season 4 Bottomless Ben
- Season 4 Tales from the Omnitrix
- Season 4 Party Poopers
- Season 4 Wind Some Lose Some
- Season 4 Digital Quality
- Season 4 Tim Buk-TV
- Season 4 Tokyo Fun Part 1: Big Bugg Bash
- Season 4 Tokyo Fun Part 2: Slamming It Up
- Season 4 Growing up is Hard to Do
- Season 4 The Hex Factor
- Season 4 Sweet Tooth
- Season 4 Medieval Upheaval
- Season 4 Speed of Sound
- Season 4 Xingo's World
- Season 4 Tummy Ache
- Season 4 Players of the Lost Park
- Season 4 De-Fanged!
- Season 4 Mock 10
- Season 4 Rekoil
- Season 4 Buktu The Future!
Ben 10 - Season 4 Episode 14 Cosplay Day
5.90 11 minutes 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.
