Monday will be filled with trick-or-treaters and scary costumes, and primetime television has special Halloween-inspired entertainment lined up for viewers tonight.

ABC’s Dancing with the Stars will see the six remaining couples return to the dance floor during the two-hour Halloween special event. The dancing competition will see a sixth elimination the following night based on performance scores.

DWTS starts at 8:30 p.m. EST Monday.

The top seven groups on NBC’s The Sing-Off will perform a Halloween medley on a spooky cemetery stage, followed by renditions of today’s popular music. The singing competition starts at 8 p.m. EST.

How I Met Your Mother will feature a Halloween episode Monday night with guest star Katie Holmes dressed as a pumpkin. The actress will play Naomi, the previous love interest of the show’s main character, Ted Mosby.

Mosby, portrayed by Josh Radnor, apparently lost Naomi’s number after a Halloween party and every year wears the same costume in the hope of meeting her again. Finally, Mosby reunites with the mysterious pumpkin and introduces her to his friends Barney Stinton (played by Neil Patrick Harris) and Robin Scherbatsky (played by Cobie Smulders).

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How I Met Your Mother will air on CBS at 8 p.m. EST.

The 1995 film starring Pan Am actress Christina Ricci, Casper, will air on ABC Family Monday night in lieu of Halloween festivities. The PG-rated movie follows a friendly ghost who befriends a young girl from out of town. The movie starts at 7 p.m. EST.

AMC will air 1978’s Halloween which stars Jamie Lee Curtis. The horror film follows a murderous psychopath in a Midwestern town, and starts at 8 p.m. EST.

The modern-day love story between a young woman and a vampire in Twilight will air on FX starting at 7:30 p.m. EST. The film stars Robert Pattinson, Kristen Stewart, and Taylor Lautner.