Janelle Marra

The gang celebrates Halloween with a fancy dress party at Stuart's comic-book shop, but Sheldon and Amy can't agree about which costumes to wear.

Mitch and Cam's friend Sal is back with a bombshell, and Phil steps in to help Luke woo a girl he likes.

Danni breaks up with JD after realising that she'll always be in second place to Elliot. Meanwhile, Dr Cox grows a new-found sensitivity.

Turk is not pleased with going to couple's therapy with Carla. An altruistic stranger helps with Elliot's faith in men and JD's faith in humanity.

Booth risks falling back into old ways when the death of a gambler drags him back into the world of poker; Hodgins reveals a new invention.

A murder investigation becomes personal for Lisbon when she learns that her underachieving younger brother, Jimmy, is being sought as a key witness.