Juliana Dever

An all-new episode of ABC's Castle titled "Under Fire" will feature the arrival of baby Ryan, but will the newborn's father make it to the birth?

On an all-new episode of ABC's CASTLE titled “Under Fire”, when Castle and Beckett discover that the victim of a building fire was actually shot to death, they get on the trail of a serial arsonist turned murderer.

On tonight's episode of ABC's CASTLE titled "The Wild Rover", when a man is found dead in an industrial cake mixer, Castle and Beckett trace the murder to an Irish gang in Staten Island and a beautiful bar owner named Siobhan O'Doul (guest star Cara Buono, "Mad Men"). Get a sneak peek below!

Join 'Castle' cast member Seamus Dever as he live tweets before and during the east coast and west coast broadcasts of 'Castle' on MONDAY, MARCH 25 from 10:00-11:00 p.m., ET/PT, on the ABC Television Network. You can follow Seamus @seamusdever on Twitter and join in on the conversation on the episode airing that night, as well as chat about the show's upcoming 100th episode airing April 1.

On CASTLE's upcoming episode, titled 'The Wild Rover,' when a man is found dead in an industrial cake mixer, Castle and Beckett trace the murder to an Irish gang in Staten Island and a beautiful bar owner named Siobhan O'Doul (guest star Cara Buono, 'Mad Men'). Much to everyone's surprise, Detective Ryan has a complicated history with Siobhan and the Staten Island crime family from his days working undercover in narcotics. When the case hits a dead end, Ryan must go back undercover to expose the killer, complicating his relationship with his wife on MONDAY, MARCH 25 (10:02-11:00 p.m., ET), on ABC.

Fans of ABC's hit drama series 'Castle' will be able to submit questions and receive real-time responses from actor Seamus Dever (Kevin Ryan), who will be up on Twitter at @seamusdever, during the West Coast broadcast of the show on MONDAY, JANUARY 9 from 10:00-11:00 p.m., PT. Seamus will also offer commentary and behind-the-scenes anecdotes about working on the show.

Fans of ABC's hit drama series 'Castle' will be able to submit questions and receive real-time responses from actor Seamus Dever (Kevin Ryan), who will be up on Twitter at @seamusdever, during the West Coast broadcast of the show on MONDAY, JANUARY 9 from 10:00-11:00 p.m., PT. Seamus will also offer commentary and behind-the-scenes anecdotes about working on the show.

In the upcoming of ABC's 'Castle' entitled 'Demons', Castle & Beckett confront the possibility of paranormal foul play when a world renown ghost hunter is mysteriously murdered while investigating a haunting at a legendary New York mansion, on 'Castle,' MONDAY, OCTOBER 24 (10:01-11:00 p.m., ET), on the ABC Television Network.

In the upcoming of ABC's 'Castle' entitled 'Demons', Castle & Beckett confront the possibility of paranormal foul play when a world renown ghost hunter is mysteriously murdered while investigating a haunting at a legendary New York mansion, on 'Castle,' MONDAY, OCTOBER 24 (10:01-11:00 p.m., ET), on the ABC Television Network.