April 12, 2010 at 12:54 PM EDT

Image Credit: Liane Hentscher/FoxOn April 29, Fox’s just-renewed Fringe will take a page from Buffy the Vampire Slayer and Scrubs by staging a musical inside inside the mind of mad scientist Walter.

“We didn’t set out to do a musical,” maintains executive producer Jeff Pinkner. “We set out to do an episode that explored Walter’s state of mind — he’s dealing with some very upsetting news. When we realized that the way Walter would deal with such news would be to try to anesthetize himself with copious amounts of marijuana, well, singing and dancing became a natural outcome.”

Anna Torv’s Olivia — who adopts a retro private-eye persona (see above) — plays a central role in Walter’s drug-induced fairy tale. Teases Pinkner: “It’ll be interesting to see how Walter really perceives her.”

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