castle season 6 guest stars billy miller alicia lagano abc 'Castle' spoilers: A hostage crisis brings Billy Miller and Alicia Lagano

“Castle” Season 6 continues to bring in the guest stars — Billy Miller and Alicia Lagano have been cast in episode 4, a story focusing on a hostage crisis. “Number One Fan” is expected to air Oct. 14 on ABC.

Lagano (“The Client List”) will play a character named Emma Briggs (as reported by TVLine). She is described as a fugitive from the law, even before she takes a group of people hostage. Strangely, Emma will not talk to the police: She only wants to speak to Richard Castle (Nathan Fillion).

Why is that? GiveMeMyRemote quotes “Castle” executive producer Andrew Marlowe for the answer: “Castle is enlisted in a hostage crisis as a negotiator because the woman doesn’t trust police, and she’s kind of his number one fan,” he explained.

Just who are these hostages that need Castle to save them? Miller (“The Young and the Restless”) is one of them, a quick-tempered Wall Street banker named Mickey Gerhardt (according to Soaps in Depth). Considering the man’s temper, he might not do so well when things get tense.