In the season finale, Dr. Devizo orchestrates a jailbreak of the League's most dangerous villains. Rex's past comes back to haunt him and the rest of the League's worst fears are realized.

Billionaire defense contractor Ivan Whiff tries to lure Lex away from the League. Meanwhile, Jewbot administers routine physicals for the League, causing Ranger to disavow modern medicine and Brad to discover he may be allergic to Cooch.

The League of Freedom prepares for the worst as the resourceful Dr. Devizo plans his escape from the mansion's underground prison. Rex attempts to match wits with Devizo while Black Saturn goes undercover and American Ranger seeks retribution for Gloria's betrayal.

Rex and Ranger's peaceful camping trip does not go as planned. Rex reveals a secret to Ranger while Saturn hides his relationship with Lex. Guest stars Nick Kroll (Parks and Recreation) and Dan Stevens (Downton Abbey).

When Black Saturn is cut off financially, he confronts his rich parents and involves Lex in a bid to restart his allowance. Jewbot explores the life of a caregiver with Black Saturn's little brother, Dudley, and Titanium Rex attempts to cancel the mansion's cable subscription.

Brad's nefarious origins are revealed and his checkered past catches up with him while the rest of the League looks for any kind of escape from Titanium Rex's game night. American Ranger discovers the joys of the modern internet.

Black Saturn gets into the dating scene after a cat burglar breaks his heart and Rex, Ranger, and Brad try a sadistic new workout regimen with personal trainer Johnny Rabdo. Meanwhile Lex tries to get on Cooch's good side as Jewbot struggles with gender identity.

Titanium Rex is stunned when Lex Lightning shows up on his doorstep claiming to be his illegitimate daughter. While Rex grapples with fatherhood the smitten American Ranger, Black Saturn, and Brad start a rock band to impress Lex.

When Sgt. Agony (Keegan-Michael Key) discovers that Cooch is illiterate, the League of Freedom bands together to help her study for her GED. American Ranger embarks on a road trip in search of the American dream and Jewbot yearns to be an inspirational influence.

American Ranger's former sidekick and current Secretary of Defense Kid Victory joins the League for dinner at the mansion. Rex tries to secure more funding while Ranger struggles with Kid Victory's lifestyle and the rest of the League goes grocery shopping.

After an embarrassing encounter with interstellar super villain Blazar, Titanium Rex resolves to salvage his public image. Black Saturn launches an investigation to find out who has been eating his food while Brad tries to take advantage of Cooch being in heat.

When Titanium Rex's old colleague Omega Ted is found dead, the League of Freedom must care for his orphaned Omega Pets. While Jewbot, Cooch, and Brad cope with pet ownership and a jealous Black Saturn, Rex and American Ranger investigate Ted's mysterious death.

After damaging a national monument, the League of Freedom gets called before Congress and investigated by military accountant Sgt. Agony. Black Saturn embarks on a showdown with his nemesis, the Groaner. Robobot investigates his origins while the team struggles to solve its budget crisis.

ÜberMansion is a glimpse into the mundane humanity of six superheroes all living in the same mansion.