Bob's Burgers Bob's Burgers

We'll have one boo cheeseburger with fright fries on the side, please!

Bob's Burgers serves up the scary with its Halloween episode featuring guest star Molly Shannon on Sunday (8:30/7:30c, Fox). The Saturday Night Live alum will lend her voice to the character Millie, a wacko little girl who has a very intense interest in her friend Louise (Kristen Schaal).

Fox renews Bob's Burgers for a fifth season

In the exclusive sneak peek below, Millie has what she thinks is an awesome idea for BFF Halloween costumes:

Bob's Burgers airs Sundays at 8:30/7:30c on Fox.