When a pilot and a surgeon, both witnesses in a murder trial, suddenly start losing their memories, Pete and reinstated agent Myka must race against time to solve the case. Meanwhile, Claudia and Steve try to locate a kitchen cleaver capable of transferring illness.

Claudia and Steve attempt to infiltrate a Civil War re-enactment. Pete gets a visit from his ex-wife, who is in town to remarry, and who inadvertently activates an artefact that follows her on her wedding day, turning her into the Queen Bee and people she touches into her slaves.