In Monday’s episode of Alcatraz, 1×06 ‘Paxton Petty,’ a bomber has returned from the past to lay explosives all over San Francisco. Take a look at six new stills from the episode below!

ALCATRAZ: "Doc" (Jorge Garcia, L) and Rebecca (Sarah Jones, R) investigate a scene in the "Paxton Petty" episode of ALCATRAZ airing Monday, Feb. 13 (9:00-10:00 PM ET/PT) on FOX. ©2012 Fox Broadcasting Co. CR: Liane Hentscher/FOX
ALCATRAZ: Matt Tanner (guest star Mehcad Brooks) helps deactivate a bomb planted by a prisoner in the "Paxton Petty" episode of ALCATRAZ airing Monday, Feb. 13 (9:00-10:00 PM ET/PT) on FOX. ©2012 Fox Broadcasting Co. CR: Liane Hentscher/FOX
ALCATRAZ: 1960s prisoner Tommy Madsen (guest star David Hoflin) is Rebecca's grandfather in the "Paxton Petty" episode of ALCATRAZ airing Monday, Feb. 13 (9:00-10:00 PM ET/PT) on FOX. ©2012 Fox Broadcasting Co. CR: Liane Hentscher/FOX
ALCATRAZ: "Doc" (Jorge Garcia, L) and Rebecca (Sarah Jones, R) stake out a park in the "Paxton Petty" episode of ALCATRAZ airing Monday, Feb. 13 (9:00-10:00 PM ET/PT) on FOX. ©2011 Fox Broadcasting Co. CR: Liane Hentscher/FOX
ALCATRAZ: Rebecca (Sarah Jones, R) captures 1960s missing prisoner Paxton Petty (guest star James Pizzinato, L) in the "Paxton Petty" episode of ALCATRAZ airing Monday, Feb. 13 (9:00-10:00 PM ET/PT) on FOX. ©2012 Fox Broadcasting Co. CR: Liane Hentscher/FOX
ALCATRAZ: In 1960, Dr. Beauregard (guest star Leon Rippy, L) and Warden James (Jonny Coyne, R) question a prisoner in the "Paxton Petty" episode of ALCATRAZ airing Monday, Feb. 13 (9:00-10:00 PM ET/PT) on FOX. ©2012 Fox Broadcasting Co. CR: Liane Hentscher/FOX
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‘Paxton Petty’ guest stars James Pizzinato as Petty, David Hoflin returning as Tommy Madsen and True Blood’s Mehcad Brooks as a Bomb Squad employee.

Episode synopsis:

When our unlikely trio tracks former inmate Paxton Petty (James Pizzinato), a sick landmine bomber who has returned only to place bombs throughout populated areas of San Francisco, methods of the past are applied to the present in the all-new “Paxton Petty” episode of ALCATRAZ airing Monday, Feb. 13 (9:00-10:00 PM ET/PT) on FOX.

Are you still intrigued by Alcatraz? Which mystery are you most curious about at the moment?