Castle and Beckett investigate the death of a competitor on a dance show, only to discover she's a different person entirely.
Tropes:
- Body Double: Barbra was originally a stripper that Odette discovered to look a bit like, and so trained her to do all the stuff she didn't like to do.
- Dead Person Impersonation: Barbra was originally Odette's body double, but decided to live as Odette full time when the latter died in a train accident.
- Hidden Depths: Turns out Lanie is a fan of dance shows and aspired to be a ballerina as a child.
- Inheritance Murder: After Odette's grandfather threatened to cut her off if she and Samuel married, they conspired to kill him so Odette could claim her inheritance.
- Master Actress: Barbra managed to fool everyone in Odette's circle when taking on her identity, including Odette's brother and childhood friend.
- She Knows Too Much: Samuel killed Barbra after he inadvertently revealed to her his part in killing Odette's grandfather.
