When Calvin takes Dave's suggestion to try a new method of promoting his business, he soon comes to regret it; Gemma recruits Tina to rescue her struggling after-school music program.
Sam enlists the ghosts to help secure a good review from an overly critical couple staying at the bed-and-breakfast. Isaac tries to integrate Nigel into his friend group.
Catherine Willows persuades Maxine Roby to let her rejoin the team. A dominatrix is found murdered near her secret sex dungeon.