"Safe" -- The team investigates whether a 15-year-old whiz kid is missing of his own accord in order to execute his elaborate plan to bomb his high school, on a rebroadcast of WITHOUT A TRACE, Thursday, Dec. 15 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Jeannot Szwarc directed the episode from a script by David Grae. (Originally broadcast 10/6/05)

Michael Welch ("Joan of Arcadia") guest stars as Lance, a school bully.

The team learns that the missing Ryan is an unpopular worrier who has obsessed about safety issues since his father's fatal mugging. They initially surmise that his disappearance may have something to do with the school bullies who picked a fight with Ryan at lunch the day prior. However, after determining that it was Ryan who wrote the ominous words "The End" on his own locker, and that he created a plan to bomb the school as a means of helping them institute effective security measures, the team wonders if he's a bomber in hiding or a victimized do-gooder. Meanwhile, a visibly weak Martin returns from his six-week convalescence and tries to convince himself and his colleagues that he's fine.