Felicia Day returns to Supernatural Wednesday for one of the show’s more geek-tastic episodes, “LARP and the Real Girl.” Proving Supernatural saves its best movie puns for the actress, Day first made the Whedonverse collide with the Winchesters last season in “The Girl with the Dungeons and Dragons Tattoo,” playing Charlie Bradbury, the I.T. genius who helps Sam (Jared Padalecki) and Dean (Jensen Ackles) get dirt on leviathan leader Dick Roman.

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