Someone is due for a blast from the past when Cara Buono serves up trouble — or at least Irish whiskey — on Castle.
TVLine has learned exclusively that Buono — who memorably played Mad Men‘s formidable Faye Miller aka she who should have been Don Draper’s second wife — will guest-star in a March episode of the ABC drama as Siobhan O’Doul, a(n obviously) beautiful bar owner who has found herself in too deep with the Staten Island Mafia.
But here’s the juicy part: When a murder case involving the Irish mob leads Beckett & Co. to Siobhan, we will discover that she shares a mysterious past with… Detective Ryan (played by Seamus Dever), who is now very married and angling to make a baby with wife Jenny.
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Since her well-received Mad Men run, Buono has guested on shows such as Hawaii Five-0 and A Gifted Man, and appeared in the well-watched Lifetime telepic Drew Peterson: Untouchable.