Writer:	Timothy J. Lea
Director:	Rob Bailey
Star:	Gary Sinise (Detective Mack "Mac" Taylor),  Hill Harper (Dr. Sheldon Hawkes),  Melina Kanakaredes (Detective Stella Bonasera),  Eddie Cahill (Detective Donald "Don" Flack, Jr.),  Carmine Giovinazzo (Danny Messer),  Anna Belknap (Lindsay Monroe)
Recurring Role:	Robert Joy (Dr. Sid Hammerback),  Sonya Walger (Jane Parsons)
Guest Star:	Eion Bailey (Dean Lessing),  Tembi Locke (Ellen Fielding),  Marc Casabani (Dr. Jim Barnes),  Carlos Alvarado (Tommy Diaz),  John Dove (Det. Scagnetti),  Carol Kiernan (Rita),  Steve Braun (Smith)

Music: S.O.S. by Rihanna (edit) Eion Bailey receives Special Guest Star billing in this episode. (edit)

Danny: (holds her arm) You OK?
Lindsay: (Touches her head)Yea. (edit) Danny: Well, you still want that ride?
Lindsay: Yeah. Sure. (edit) Danny: Military-grade explosives are hard to get a hold of.
Stella: Not hard enough. (edit) Mac: It's quiet in here.
Flack: This place is a brokerage firm. No work on Sundays.
Mac: Must be nice, huh? (edit) Stella: You know, he's on round the clock care. You don't all have to stay and stand watch.
Mac: We don't have to.
Stella: True. Black coffee, two sugars, right? (edit)

Goof: When Mac is taking pictures of Flack after his surgery Flack's mouth is slightly parted but when they show the photo that Mac took Flack's mouth is closed. (edit) The building that explodes in this episode is the same one that was used on Angel during its first season, exiting the series with an explosion in that seasons finale. (edit) Goof: Mac refers to himself as Lieutenant while the papers Lessing has on him has his rank leaving from the military as Seargant. (edit) Goof: When the building blows up, you see some people being blasted sideways, sitting at tables like from a food place. Why would people be sitting calmly while an NYPD officer yelled to run? (edit) Goof: The paperwork form the bomber had about Mac had a mistake in the title. It read "Enlisted Record and Report of Seperation." It should be "Separation." (edit)

The parts of this episode dealing with the 1983 bombing of the Marine barracks in Lebanon are based on a real event. As Mac Taylor mentions, 241 American servicemen were killed that day, 220 of whom were Marines. The bombing was a suicide attack involving a truck packed with explosives. The perpetrators are still unknown, but many people have suspected Hezbollah. (edit)