Season 5, Episode 21
Fifth Season box art
Air date 1 May 2009
Episode guide
The Fifth Man
Greatest Hits

Charlie, still feeling guilty about Don's injury, focuses on finding a frighteningly intelligent serial killer who is meticulous about eliminating all witnesses to his crimes, thereby murdering unobserved and undetected.


  • There is a dual sense of the inhumane behavior of the killer and the perturbation of Charlie's worldview brought about by his awareness of Don's mortality and his own fallibility.

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