The Simpsons | 8pm | Fox

An unearthed corpse opens up a cold case from Springfield in the 1980s… as well as a steamy relationship between young Grampa and Agnes Skinner.

SWAT | 8pm | CBS

When a spree of brutal stash house robberies spills into L.A., 20-Squad must team up with the sheriff’s department’s gang unit to unmask a violent crew who leaves no witness alive.

Ghosts | 8:30pm | CBS

When Sam’s dad (Dean Norris) comes to Woodstone for a visit, Patience (Mary Holland) puts their father-daughter relationship to the test. Also, Isaac must deal with the fallout from his breakup with Nigel and Thor and Flower handle an awkward situation with Nancy.

Chicago Med | 8pm | NBC

Halloween chaos takes over the E.D. Hannah helps a pregnant woman with an autistic son. Charles clashes with nurse Jackie on a psych case.

FBI | 8pm | CBS

The team is on the case when a suburban couple is murdered and all forensic evidence points to the home’s previous owner, who is currently serving 10 years in federal prison. Meanwhile, OA reunites with an old military colleague, and Scola tries to welcome a new partner.

9-1-1: Lone Star | 8pm | Fox

The 126 race into action when a horse barrels into a brewery with an unconscious rider on its back and then to a bus full of tourists all experiencing seizures. Judd introduces Owen to Wyatt’s mother Marlene. Carlos and T.K. start couples counseling, when Carlos investigation into his father’s murder becomes all-consuming.

The Simpsons | 8:30pm | Fox

Lisa has a blazing misadventure in the dark world of Capital City’s downtown art scene. (Live to all time zones.)

SWAT | 8pm | CBS

Season premiere: SWAT tackles a mission with personal ties for Hondo when they race to find a group of missing students and their bus driver, Hondo’s former high school football coach. Also, Hicks has reservations regarding Hondo’s new 20-Squad team addition, Devin Gamble (Annie Ilonzeh), a cop with a family background deeply entrenched in crime.

Ghosts | 8:30pm | CBS

Season premiere: While Sam and the ghosts race to find him, Isaac comes face to face with Puritan ghost Patience (Mary Holland) for the first time since she was lost in the dirt.

The Summit | 9:30pm | CBS

As the trekkers struggle with the arduous terrain, the division of alliances among them becomes noticeable. When the Mountain’s Keeper observes the group’s slow pace, she offers a proposition to help them stay on track to reach the summit in time, but not without both individual and collective consequences.

FBI: International | 9pm | CBS

Season premiere: The Fly Team is introduced to Supervisory Special Agent Wesley “Wes” Mitchell (new series regular Jesse Lee Soffer) when his partner is shot in Los Angeles and the suspects flee to Budapest, sending Mitchell overseas.

NCIS | 8pm | CBS

Season premiere: NCIS searches for a missing undercover agent in the midst of an active hostage situation.

Tracker | 8pm | CBS

Season premiere: While investigating the strange disappearance of a missing family whose car was found abandoned on the side of the road in the backwoods of Arkansas, Colter makes a shocking discovery about the mother’s past that leads him into the world of organized crime. Also, Reenie opens up her new law firm and enlists […]

Saturday Night Live | NBC

Host Ariana Grande and musical guest Stevie Nicks.

The Irrational | 8pm | NBC

Repeat: When Rose goes missing, Alec quickly discovers this is no ordinary kidnapping. While Rose plays a dangerous game to stall for time, Alec takes matters into his own hands to find her.