Justina Machado is Superstore's New District Manager. What Could Go Wrong?

Halloween night brings a mix of tricks and treats as One Day at a Time's Justina Machado joins Superstore in a recurring role just in time for the show's Halloween episode. Grey's Anatomy and Perfect Harmony are also marking the holiday, as is the CW with a countdown of The 13 Scariest Movies of All Time. Here's what's new and noteworthy this Thursday:

NEW EPISODE: One Day at a Time fans have one more reason to celebrate. While we await the revived show's fourth season on Pop/CBS, the Alvarez family's Justina Machado is joining Superstore in a recurring role as the Cloud 9's new district manager. In tonight's episode, Amy (America Fererra) attempts to impress her new boss as the store's Halloween spirit hits fever pitch. 8:00 PM ET on NBC

SPORTS: You know what goes great with Halloween candy? Thursday Night Football! Tonight, the San Francisco 49ers face the Arizona Cardinals at State Farm Stadium. 8:00 PM ET on FOX

NEW EPISODE: Grey's Anatomy sees Richard (James Pickens Jr) trying distract investors when skeletons are discovered in the construction site. Meanwhile, Teddy (Kim Raver) tasks herself with creating original Halloween costumes for Owen's kids. Watch the preview. 8:00 PM ET on ABC

NEW EPISODE:  When a young girl is assaulted, Law & Order: Special Victims Unit unearths an unnerving truth. Meanwhile, Benson (Mariska Hargitay) crosses paths with an individual from her past. 10:00 PM ET on NBC

SPECIAL: Fans are still wondering if Dean Cain will appear in The CW's upcoming Crisis on Infinite Earths Arrowverse crossover (he already plays Supergirl's father, which may complicate things) but that isn't stopping him from hosting The CW's Halloween special The 13 Scariest Movies of All Time. Tune in to see if your favorites make the list. 8:00 PM ET on The CW

ALSO TODAY

• NBA Basketball - the Denver Nuggets play the New Orleans Pelicans from Smoothie King Center. 9:30 PM ET on TNT
• Perfect Harmony finds Dwayne (Geno Segers) skipping out on a long-running Halloween event. 8:30 PM ET on NBC
• Ghost Adventures: Curse of the Harrisville Farmhouse delves into the secrets of a 300-year-old farmhouse awash in spectral activity. 9:00 PM ET on Travel Channel
• Nowhere Man is Netflix's first Mandarin series, which follows a group of triad brothers who seal their own fates on one fateful night. Watch the preview. Streaming on Netflix

Mike Attebery is Senior Editor at Primetimer and the author of seven mystery thrillers. Follow him on Twitter at @mikeattebery.