Did he do that?

TVLine has learned exclusively that Jaleel White has been cast on the upcoming Castle episode, “Dead From New York.”

TV’s erstwhile Urkel will play Mickey Franks, the larger-than-life star of a Saturday Night Live-like sketch series who has a tendency toward outrageous — and possibly homicidal — behavior.

In recent years, White has guested on series such as Hawaii Five-0, CSI, Drop Dead Diva and Psych, as well as competed on Dancing With the Stars.

ABC’s Castle resumes Season 7 on April 20 with Episode 20; White appears in Episode 22.

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