Airdate: 2008-12-15

Michael gets medical attention from the most unlikely of places, and Charles Westmoreland returns to help uncover the true meaning of Scylla. Meanwhile, Lincoln and Sucre race to stop Gretchen before Scylla is lost forever in the “Going Under” episode of PRISON BREAK airing Monday, Dec. 15 (9:00-10:00 PM ET/PT) on FOX. (PB-415) (TV-14 L, V)

Cast: Dominic Purcell as Lincoln Burrows; Wentworth Miller as Michael Scofield; Michael Rapaport as Don Self; Amaury Nolasco as Fernando Sucre; Robert Knepper as Theodore “T-Bag” Bagwell; Jodi Lyn O’Keefe as Gretchen; Sarah Wayne Callies as Dr. Sara Tancredi; William Fichtner as Alexander Mahone

Guest Cast: Muse Watson as Charles Westmoreland; Leon Russom as General Jonathan Krantz/Pad Man; Barbara Eve Harris as Felicia Lang; Jason Davis as Wheeler; Heather McComb as Rita; Regan Licciardello as Emily; Denise Crosby as Doctor; Titus Welliver as The Representative