Alicia Logano guest stars as an accused murderer who takes hostages and will only speak to Castle. "Number One Fan" is the fourth episode of the show's sixth season.

Summer Glau will be guest starring on a Season 8 episode of Castle next to former Firefly costar Nathan Fillion.

Castle is cosplaying as Jimmy Stewart in Rear Window

Castle and Beckett were shot in their own loft on Castle. "Crossfire" is the 22nd episode of the show's eighth season.

It's Halloween on Castle. Kate and Rick take on a case that involves a costume party.

Always check who's on the other side of that door before opening it. Didn't Castle always tout how he lived in a secure building? Security seems to be lacking.

Dr. Lanie Parish is on the case on Castle. Tamala Jones played the medical examiner for all eight seasons of the series.

Nathan Fillion has found a great role for himself. He plays the title character in Castle.

Rick ends up on stage when he and Beckett investigate the murder of a cruise ship entertainer on Castle. "Mr. & Mrs. Castle" is the eighth episode of the show's eighth season.

Ruben Santiago-Hudson played Capt. Roy Montgomery from season 1 to season 3 of Castle.

An investigation into a vampire fetish community eventually wrapped up with Rick Castle throwing an epic Halloween bash for all of his friends. Castle actually wore two costumes in Castle Season 2 Episode 6, “Vampire Weekend” The first was from Nathan Fillion’s cult favorite Firefly character Capt. Mal Reynolds but for the actual party he dressed as one of his favorite authors, Edgar Allen Poe. Our favorites were Lanie as Cat Woman and Martha as Cruella de Vil.

The main cast of the ABC series Castle included Seamus Dever, Tamala Jones, Jon Huertas, Stana Katic, Nathan Fillion, Molly Quinn, and Susan Sullivan.