Season 4 Episode
- Season 4 Bionic Rebellion (1)
- Season 4 Bionic Rebellion (2)
- Season 4 Left Behind
- Season 4 Under Siege
- Season 4 Bionic Dog
- Season 4 Mission Mania
- Season 4 Simulation Manipulation
- Season 4 Forbidden Hero
- Season 4 Spider Island
- Season 4 Spike vs. Spikette
- Season 4 Lab Rats vs. Mighty Med
- Season 4 Space Elevator
- Season 4 Bionic Action Hero (1)
- Season 4 Bionic Action Hero (2)
- Season 4 One of Us
- Season 4 Bob Zombie
- Season 4 Human Eddy
- Season 4 The Curse of the Screaming Skull
- Season 4 On the Edge
- Season 4 Ultimate Tailgate Challenge
- Season 4 And Then There Were Four
- Season 4 Space Colony
- Season 4 The Vanishing (1)
- Season 4 The Vanishing (2)
Lab Rats - Season 4 Episode 24 The Vanishing (2)
8.08 22 minutes Giselle reveals she dug up Marcus from Douglas' old lair and rebuilt him, piece-by-piece. Marcus wants revenge on Douglas for leaving him to die. Everyone rushes Giselle and Marcus, but Marcus knocks everyone unconscious. Donald and Douglas are tied together in chairs, while Adam, Bree, Chase, and Leo are put in the chamber with the students, while Daniel is pulled out.
