IMAGES: Disco Divas in Castle’s “That 70’s Show”

Castle and Beckett are about to get their groove on, 70’s style in ABC Castle’s upcoming April 21 episode.

Entitled “That 70’s Show” the episode will see our duo investigating a three decades old murder of an infamous New York mobster who disappeared in the seventies and is found in the present day by construction workers.

However the only witness to this ancient Mafia hit is a man who thinks it’s still the 1970’s.

In order to uncover what he knows, they must play into his delusion, and party like it’s the last days of disco.

Disco on down, Monday April 21 (10:01-11:00 p.m., ET) on the ABC Television Network.

Castle stars Nathan Fillion as Richard Castle, Stana Katic as NYPD Detective Kate Beckett, Susan Sullivan as Martha Rodgers, Molly Quinn as Alexis Castle, Penny Johnson Jerald as NYPD Captain Victoria Gates, Tamala Jones as Medical Examiner Lanie Parish, Jon Huertas as NYPD Detective Javier Esposito, and Seamus Dever as NYPD Detective Kevin Ryan.

Guest Cast: Jon Polito as Harold Metzger, Richard Portnow as Milt Boyle, Ray Abruzzo as Frank Russo, Gina Hecht as Marie Russo, Dawn Lewis as Yvonne.

“That ‘70s Show” was written by David Amann and directed by Kevin Hooks.

Castle is produced by ABC Studios. Andrew Marlowe serves as executive producer/writer, along with executive producers Rob Bowman, David Amann, David Grae, and Armyan Bernstein.