While fans of the police procedural television drama series 'Castle' are eager to learn about the latest developments in the relationship of Richard Castle (Nathan Fillion) and Kate Beckett (Stana Katic), the showrunners will take them back to another mysterious murder case in the penultimate episode of Season 7 titled 'Dead From New York.'

According to IB Times, 'Castle' Season 7 episode 22, which will air at 10:00 pm on Monday, May 4, will not only concentrate on the different aspects of a late-night show titled 'Saturday Night Tonight,' but will also deal with the death of Sid Ross, the creator of the show.

It is likely that in the upcoming episode the crime drama will revolve around the darker aspect of variety shows, wherein the influential creator will be found killed and it is possible that the prime suspects would be from among the cast members.

Meanwhile, the official synopsis of 'Castle' Season 7 episode 22 as well several spoilers hints that Mickey Franks, portrayed by Jaleel White, will turn out to be the culprit. The official synopsis of 'Dead From New York' describes Mickey Franks as an impressive sketch comedy star with a penchant for extreme and perhaps homicidal behavior, a promo video clip of the episode released by Zap2it shows him ignoring the questions of Beckett and her partner rather tidily.

According to the synopsis, the detectives will reveal a shocking secret that may clarify Sid's murder while they explore the victim's life and the vibrant world of 'Saturday Night Tonight.' Hence, it is likely that Carly Rae Jepsen will also have a part in the crime and the next week's episode of 'Castle' may also focus on her relationship with the creator.

In addition to the cast members already mentioned above, the series will also star Gregory Harrison in the role of Danny Valentine, James Eckhouse portraying Gene Vogel, Joy Osmanski as Liz Bell and Mark Rolston in Kurt Van Zant's role.

'Castle' Season 7 episode 22 titled 'Dead From New York' will air on Monday, 4 May, at 10:00 pm on ABC.