Michael has trailed Gretchen/Susan, Whistler and Mahone to L.A. Chaos reigns in SONA while T-Bag, Bellick and Sucre go missing. Lincoln and L.J. continue to stay with Sofia.

Filed under: Season 4, "The Company will do anything to get it back.", Air Force jet, Al Vicente (Flaco), Amaury Nolasco (Fernando Sucre), Arizona desert, bail, Beau Dremann (Chicago Cop), bird book, break-in, Breakout, Callie Thorne (Pam Mahone), Carolyn Wickwire (Mrs. Bellick), Chris Nelson Norris (Military Limo Driver), Chris Vance (James Whistler), Co.'s black book, Colorado jail, Cress Williams (Wyatt), Crystal Mantecon (Carmelita), Danay Garcia (Sofia Lugo), data card, daughter, Doc, Doc's death, Dominic Flores (Gordo), Dominic Purcell (Lincoln Burrows), Homeland Security agent, hospital, How high is your threshold for pain?, independent contractor, Jim Klock (Laser Tech), JLOK, Jodi Lyn O'Keefe (Gretchen Morgan), John Rosenfeld (Jason Lief), Kevin Hooks, LA, Leon Russom (General Jonathan Kranz), Linc, Marshall Allman (LJ Burrows), Matt Olmstead, MBBM, Michael Rapaport (Agent Don Self), Mojave Desert, Nathan Castaneda (Sancho), New Millionaire, Omar Leyva (Coyote), Panama, pay phone, police station, Rachel Loera (Theresa Delgado), Ricki Noel Lander (Server), Robert Knepper (Theodore "T-Bag" Bagwell), Santa Monica Pier, Sarah Wayne Callies (Dr. Sara Tancredi), Scylla, Self's deal, Silver Fox's file, Sky Soleil (Colorado Cop), SOG, SONA, Steve Tom (Stuart Tuxhorn), tattoo, ticket to Chicago, transfer order, Van Trinh (Guest List Woman), Wade Williams (Brad Bellick), warning, Watch your step with that thing, Wentworth Miller (Michael Scofield), Wilbur Fitzgerald (Bruce Bennett), William Fichtner (Alex Mahone), Zachary Friedman (Cameron Mahone)