Psych: Who Ya Gonna Call?

Head Detective Lassiter is in charge of the annual Civil War reenactment. Shawn knows watching the meltdowns at the rehearsals is more fun than the actual show, and so he and Gus, a history buff, show up to watch. This year they are reenacting the Battle of Piper's Cove, in which a nurse, played by Sally Reynolds, kills Confederate Captain Quantrill, played by Nelson Poe. Sally ends up missing her cue, so Lassiter stops rehearsal only to find Nelson dead for real.