ABC's "Castle" - Season Seven

CASTLE - "Dead From New York" - When Sid Ross, the powerful creator of a long-running sketch comedy show is killed, Castle and Beckett are called to investigate. But as they delve into the victim's life and the colorful world of "Saturday Night Tonight," they uncover a shocking secret that may explain Sid's murder. Carly Rae Jepson is featured as a musical guest, on "Castle," MONDAY, MAY 4 (10:01-11:00 p.m., ET) on the Disney General Entertainment Content via Getty Images Television Network. Also, Jaleel White plays Mickey Franks, a larger-than-life sketch comedy star with a tendency toward outrageous -- and possibly homicidal -- behavior. (Photo by John Fleenor/Disney General Entertainment Content via Getty Images)