The Great Louse Detective

Bart's arch-enemy Sideshow Bob is sent to live with the Simpsons so he can help find Homer's attempted killer, who turns out to be the son of the late Frank Grimes.

At the spa, Homer is nearly killed when a mysterious person locks him in a sauna with a wrench but is saved inadvertently when Krusty the Clown unlocks the door.

"The Great Louse Detective" was written by John Frink and Don Payne and directed by Steven Dean Moore as part of the fourteenth season of The Simpsons (2002–03).

[1] American actor Kelsey Grammer guest starred in the episode, returning to voice the recurring character Sideshow Bob.

[2][3] Since season three's "Black Widower" (1992), the writers have echoed the premise of Wile E. Coyote chasing the Road Runner from the 1949–1966 Looney Tunes cartoons by having Bob unexpectedly insert himself into Bart's life and attempt to kill him.

Executive producer Al Jean has compared Bob's character to that of Wile E. Coyote, noting that both are intelligent, yet always foiled by what they perceive as an inferior intellect.

[6] On December 6, 2011, "The Great Louse Detective" was released on Blu-ray and DVD as part of the box set The Simpsons – The Complete Fourteenth Season.

[7] Staff members Matt Groening, Al Jean, John Frink, Ian Maxtone-Graham, Matt Selman, Tim Long, Michael Price, Tom Gammill, Steven Dean Moore, Mike B. Anderson, and David Silverman, as well as cast member Dan Castellaneta, participated in the DVD audio commentary for the episode.

"[9] DVD Movie Guide's Colin Jacobson commented that "Over the years, we’ve gotten many a great Sideshow Bob episode, so this one has to live up to steep competition.