While the team investigates the murder of a toy company CEO, Castle uncovers a lead to his mysterious disappearance, launching him into a dangerous investigation of his own.
- Dead Man Writing: The contents of the safe deposit box Castle left in Montreal contains three envelopes each with a video for Martha, Alexis, and Beckett. It's a message telling them he loves them and if they're seeing this, he's probably dead.
- Manchild: Castle spends the entirety of the interview at the toy company playing with toys.
- O.O.C. Is Serious Business: Any other case, Castle would be all over the alien abduction angle on his disappearance, instead he discards it right away.
- Series Continuity Error: A first season episode had Castle say Alexis's favorite toy was Monkey Bunkey, and she never went anywhere with out it. Here he says it was a different toy, Sunshine Sarah, a Raggedy Anne expy.
