By Will Robinson
Updated June 03, 2016 at 11:44 PM EDT
Credit: Getty Images (2)

The Simpsons‘ Sideshow Bob is a fan-favorite character, thanks in part to Kelsey Grammer’s silky, malevolent voice work. Bob’s killer tone was years in the making, Grammer says on Friday’s episode of The Graham Norton Show.

Grammer recounts how he often visited The Simpsons co-developer Sam Simon — a former Cheers writer — on the show’s set. One day, Simon asked Grammer if he could sing the Cole Porter standard “Ev’ry Time We Say Goodbye” for the show.

“‘Well, we got this character who’s never actually said anything on the show. … We want him to speak finally,'” Grammer recalls Simon saying. “Can you do it?”

The former Frasier star read the script and loved the “cultured” serial killer Bob — and had the perfect voice in mind to bring him to life.

Hear the full story in the video above.

The Graham Norton Show

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