Penny and Leonard organize a paintball game that results in mayhem when Sheldon is jealous of Amy. Also, Koothrappali catches Anu with her ex-boyfriend, and Stuart doesn’t want to move…

Sheldon and Amy are devastated after learning from a Russian paper that Super Asymmetry has already been discovered and disproven. Ultra-competitive Bernadette asks Stuart’s girlfriend to teach her how to…

When a murder investigation reveals the dark side of Hollywood, Chloe puts her life on the line to protect an innocent victim. Then, Lucifer comes up with a hell-raising scheme…

Piper faces a new backlash over special privileges; Caputo feels pressure to toughen up, resulting in administrative changes.

Piper starts a prison newsletter with the help of Healy and a few other inmates; Vee launches an entrepreneurial enterprise.

Love is in the air as the inmates prepare for a Valentine’s Day party; Red makes and intriguing new discovery. Larry asks Piper to be his prison mole.

A bathroom turf war sees deeper lines drawn in the sand as Gloria and Vee go head to head. Piper receives devastating news.

Sophia gives the women a much-needed lesson in female anatomy; Morello takes a detour; Larry makes some life changes.

Piper is challenged by her Soso experience; Morello gets her heart broken; a figure from Taystee’s past arrives to disturb the status quo.

A mock Job Fair provides Taystee with a chance to show off her business smarts; Red feels isolated from her prison family.

Red’s scheme to reclaim her kitchen backfires; the inmates stage a Christmas pageant; Piper’s plans unravel even as she realizes her life is in jeopardy.

Painful truths reorient several relationships and careers; Pennsatucky feels disrespected by Piper, which is not good; Larry delivers an ultimatum.

Pennsatucky discovers a new skill; the inmates try to scare delinquent teenagers straight; Pornstache’s side business suffers a tragic setback.

Thanksgiving arrives with the promise of a visit by Larry, but Piper’s raunchy dance moves land her in solitary with a holiday feast of moldy bologna.

Piper wants the prison’s outdoor running track reopened, but in order to get it, she’ll have to give her corrections officer something he wants.

The inmates campaign along racial lines for positions on a prisoners council, but Piper tries to stay above the increasingly raucous competition.