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.
Episodes in Season 4
Bionic Rebellion (1)
22 min
Bionic Rebellion (2)
22 min
Left Behind
22 min
Under Siege
22 min
Bionic Dog
22 min
Mission Mania
22 min
Simulation Manipulation
22 min
Forbidden Hero
22 min
Spider Island
22 min
Spike vs. Spikette
22 min
Lab Rats vs. Mighty Med
44 min
Space Elevator
22 min
Bionic Action Hero (1)
22 min
Bionic Action Hero (2)
22 min
One of Us
22 min
Bob Zombie
22 min
Human Eddy
22 min
The Curse of the Screaming Skull
22 min
On the Edge
44 min
Ultimate Tailgate Challenge
22 min
And Then There Were Four
22 min
Space Colony
22 min
The Vanishing (1)
22 min
The Vanishing (2)
22 min
