The Strength of a Knight is the tenth episode of season 4.5
Zax takes leadership when the Millitary and the Agency target and attack Zax's parents. The Lab Rats and Zax must break through the Millitary and the Agency to save his parents.
The Lab Rats, Leo, Hallie, Mark and Donald are at Zax's house and he's looking for his parents. He goes into his parents room and he sees a note from the millitary and it says that they took his parents. They know he's bionic so its either give himself up or he looses his parents. It shows the location on the note where they're being held. They go to the location and they see Zax's parents being held by the millitary AND the Agency! Before they give him his parents, he must give himself up.His parents don't know what they're talking about and Zax confesses that he's bionic. He shoots lightning for proof. Zax doesn't give himself up. He gives a signal to Mark and Adam and they blastwave them and they escape.The Millitary and The Agency stop them with they're robot. The Lab Rats distract the robot while Leo disables the main power source. The robot shuts down and Leo jumps down as the robot falls and explodes. They escape back to Zax's house. His parents are safe but they're still suprised that Zax didn't tell them that he's bionic but in the end they're happy that everyone is safe and they celebrate by eating some ice cream.
Billy Unger as Chase Davenport
Spencer Boldman as Adam Davenport
Kelli Berglund as Bree Davenport
Tyrel Jackson Williams as Leo Dooley
Hal Sparks as Donald Davenport
Zendaya as Sara Davenport
Ryan Newman as Hallie King
Rahart Adams as Zax Knight
Guest Stars and Recurring
Jennifer Aniston as Laura Knight
Jason Sudeikis as Mack Knight