Michael, Whistler, Mahone and McGrady escape from Sona – but not everything goes according to plan, and the exchange is compromised.

Amanda gets a job at The Rack, but her first day does not go well. Meanwhile, Jessi’s presence in Kyle’s life continues to irk Amanda, and Josh is placed in a difficult situation when $120 goes missing from The Rack’s cash register.

Walter fights with Jesse over his drug use, causing him to leave Walter alone with their captive, Krazy-8. Meanwhile, Hank has a scared straight moment with Walter Jr..

McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape.

As Michael finalizes plans for the escape, his fellow plotters begin to turn on him. Meanwhile, Whistler ponders a betrayal when Sofia is threatened.

Amanda’s presence puts the Tragers into an awkward position when a social worker comes to evaluate their fitness to take care of Kyle.

While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator — who is now on the loose.