Principal Perry is in danger and the Lab Rats are at risk of exposing their powers to her and Davenport's business is ruined.
Douglas returns to try to convince Chase to join him.
When Marcus kidnaps Davenport, the team must try and rescue him which leads to a battle of bionic teenagers. The Shadowy figure reveals he is the Lab Rat's biological father.
When Marcus catches Leo in his evil liar, Leo must find a way to escape and inform the team of the secret lab.
The team investigates when a stock brokerwho moonlights as a stripperis murdered. Elsewhere, Booth must cope with a request from his mother who has reappeared after a 24-year absence.