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.

Kyle and Amanda’s relationship hits a period of uncertainty after she makes a surprise visit home, but is uncharacteristically cagey about the reason why. Meanwhile, Jesse loses her patience with Kyle when he keeps putting off her training sessions.

Walt and Jesse attempt to tie up loose ends. The desperate situation gets more complicated with the flip of a coin. Walt’s wife, Skyler, becomes suspicious of Walt’s strange behavior.

Colonel Sheppard and Dr. McKay must protect a child princess on a pilgrimage before she can become queen, and learn that she has dangerous enemies threatening her life.

Sammy reminds Lechero that Papo is dead and presses Lechero to kill Michael. Lechero replies that he also wants Michael dead, but he does not want an uprising in Sona. Mahone receives a picture of his son through the mail. Lechero, Michael, Mahone, Whistler and T-Bag inspect the hole in the tunnel and Michael requests a saw and hammer to support the tunnel. Sammy takes the over the reign of Sona with the pistol delivered by Augusto and other three gangsters and promises a box of bottles of rum for the inmate that kills Michael. T-Bag convinces Bellick to give the chicken foot to Sammy, promising him a spot on the escape team. When Bellick discovers that there is no more acetone, he unsuccessfully tries to call-off the fight. Meanwhile Lincoln and Sofia visits Osberto and buy a bomb. Sucre plants the bomb under the seat of Gretchen’s car but she unravels that, saying she found Maricruz tracking the US$ 25,000.00 check she gave to him. Sammy leaves the fighting with Bellick to chase Michael, who is locked behind the door in the tunnel with Mahone. Sammy beats Whistler, who was left behind, trying to get the combination of the door. Michael removes a wedge from the hole and the tunnel collapses over Sammy, burying him, while Lechero and Mahone kill the three other gangsters. Sofia finds a wallet hidden in Whistler’s bag.