K.K. Dodds

Flashbacks unveil how Lincoln, Sucre, T-Bag, C-Note and Dr Sara ended up in prison and what drove Michael to plan his brother's escape.

Michael and Sarah become more than strangers on a train en route to confront the president; Mahone recruits a new ally in his bid to capture the fugitives; T-Bag puts on a happy face; a fourth escapee takes a fall.

Michael and Sara realise that Pope (Stacy Keach) is the key to bringing down the company; C-Note fears for his daughter's life; T-Bag takes the Hollander family to his childhood home.

Michael and Lincoln form a tenuous alliance with Kellerman; tragedy strikes the Mahone family; Bellick takes action to prove he is still in charge at Fox River.

Domestic violence in Russell's family leads to a tragedy; Sipowicz and Medavoy probe an old missing-persons case that yields a murder victim.