Lab Rats Season 4 Episode 21
And Then There Were Four
Everyone is shocked when Douglas introduces a fourth bionic sibling named Daniel who’s been living a normal life with an adopted family. Daniel later comes to the academy to meet his father, uncle, and cousins. After Daniel's bionics are accidentally activated by the Lab Rats, Donald and Douglas find out what happened they have to come clean to Daniel about his power-replicating abilities. Daniel also finds out that his cousins are actually his biologic siblings. Filled with anger, Daniel goes out for air on the beach, where Leo and him have a conversation about Douglas. Not too long after, Daniel, using Leo's abilities, accidentally causes a leak in the hydro-loop's fuel tank. After Adam and Daniel combined their powers to stop it, Douglas apologizes to Daniel for lying and Daniel decides to give Douglas a second chance.
4 - 26Episode 26Feb. 17, 2016- 4 - 25Episode 25Feb. 10, 2016
- 4 - 24The Vanishing (2)Feb. 03, 2016
- 4 - 23The Vanishing (1)Feb. 03, 2016
- 4 - 22Space ColonyJan. 20, 2016
- 4 - 21And Then There Were FourJan. 13, 2016
- 4 - 20Ultimate Tailgate ChallengeDec. 02, 2015
- 4 - 19On the EdgeNov. 11, 2015
- 4 - 18The Curse of the Screaming SkullOct. 21, 2015
- 4 - 17Human EddyOct. 14, 2015
- 4 - 16Bob ZombieSep. 30, 2015
- 4 - 15One of UsAug. 12, 2015
- 4 - 14Bionic Action Hero (2)Aug. 05, 2015
- 4 - 13Bionic Action Hero (1)Aug. 05, 2015
- 4 - 12Space ElevatorJul. 29, 2015
- 4 - 11Lab Rats vs. Mighty MedJul. 22, 2015
- 4 - 10Spike vs. SpiketteJul. 15, 2015
- 4 - 9Spider IslandJul. 08, 2015
- 4 - 8Forbidden HeroJul. 01, 2015
- 4 - 7Simulation ManipulationApr. 22, 2015
- 4 - 6Mission ManiaApr. 15, 2015
- 4 - 5Bionic DogApr. 08, 2015
- 4 - 4Under SiegeApr. 01, 2015
- 4 - 3Left BehindMar. 25, 2015
- 4 - 2Bionic Rebellion: Part TwoMar. 18, 2015
- 4 - 1Bionic Rebellion: Part OneMar. 18, 2015
