Castle is not a stripper! He makes this point well known in this preview for the episode "Almost Famous," which centers around the death of a stripper.
Beckett's former partner returns on this episode, while the action takes place at a graveyard. Watch this promo and get excited for "Under the Gun."

Castle Season 3 Quotes

Beckett: What am I supposed to charge him with? Being a twin? Castle: Being an evil twin in a magic murder.

The no hassle tassel - these were the height of fashion in 1984.