Josh Stamberg

Drop Dead Diva's Josh Stamberg has signed on for a two-episode arc on ABC's Castle, TVLine.com reports.

As TVGuide.com first reported, the two-episode February sweeps event will feature The Chicago Code's Jennifer Beals as a sexy CIA operative who helps Castle (Nathan Fillion) and Beckett (Stana Katic) in the search for a fellow CIA agent who has gone rogue and is a suspect in their murder case.

Exclusive: Castle books Jennifer Beals for two-parter

Stamberg, has also appeared on Studio 60 and the Sunset Strip and Courting Alex, will portray an intelligence officer who assists with the case.

Castle returns with new episodes on Monday, Jan. 9 at 10/9c on ABC.