TV THIS WEEK: Chucky, La Brea, Walking Dead and Doctor Who finales; Lost in Space, The Flash & more

We're barreling toward the end of 2021, and as the calendar draws to a close so do several fan favorite genre shows this week. From breakout sci-fi hits to horror favorites, let's break it all down.

The finale-heavy slate this week includes season-enders for SYFY/USA's Chucky and NBC's La Brea, plus the series finale of AMC's The Walking Dead event series World Beyond. Over on BBC America, Doctor Who wraps up its five-episode "Flux" event. It's not all finales, though, as Netflix is debuting the third and final season of fan favorite remake Lost in Space. Disney+ is also bringing that MCU magic, with a new episode of Hawkeye.

Digging deeper, SYFY has a new Day of the Dead, plus a fresh installment of Intergalactic. The CW has a new episode of The Flash (which marks the third installment of the "Armageddon" event, which brings Black Lightning deeper into the fold), and the network also has the DC's Legends of Tomorrow-inspired animated holiday special Beebo Saves Christmas. AMC has the midseason finale of Fear the Walking Dead and Netflix has a fresh batch of episodes for animated series Jurassic World: Camp Cretaceous.

Check out the full rundown below.

HIGHLIGHTS

The Flash (The CW), Tuesday 8 p.m. - "Armageddon, Part 3"

Barry meets Black Lightning at the Hall of Justice after things take a dire turn with Despero; Iris suspects something is off with Despero's vision of the future so she seeks help from a powerful ally.

La Brea (NBC), Tuesday 9 p.m. - "Topanga"

SEASON FINALE: With news of one last sinkhole opening, Gavin, Izzy and Dr. Nathan race to Seattle to launch a final rescue effort before it's too late; Eve embarks on a perilous journey to send a young boy though a portal in order to save her family.

Chucky (SYFY), Tuesday 10 p.m. - "An Affair to Dismember"

SEASON FINALE: Scores will be settled as Chucky's diabolical plan comes to fruition at a dangerous, public venue.

Lost in Space (Netflix), Wednesday - Final Season

SEASON PREMIERE: After a year of being trapped on a mysterious planet, Judy, Penny, Will and the Robot must lead the 97 young Colonists in a harrowing evacuation -- but not before secrets are unearthed that will change their lives forever. Meanwhile John and Maureen -- with Don at their side -- must battle overwhelming odds as they try to reunite with their kids.

Doctor Who (BBC America), Sunday 8 p.m. - "Flux - Part 5"

EVENT FINALE: The final chapter of the "Flux" event. An eccentric yet compassionate extraterrestrial Time Lord ventures through time and space to battle injustice and solve problems across the universe.

The Walking Dead: World Beyond (AMC), Sunday 10:14 p.m. - "The Last Light"

SERIES FINALE: The remaining members of the group fight back enemies, both living and dead, on their quest to save the future.

MONDAY

4400 (The CW), Monday 9 p.m. - "If You Love Something"

Jharrel and Keisha must earn the trust of the 4400 if they truly want to help keep them safe; Rev continues to grow his flock.

TUESDAY

The Flash (The CW), Tuesday 8 p.m. - "Armageddon, Part 3"

See more in our "Highlights" section above.

La Brea (NBC), Tuesday 9 p.m. - "Topanga"

See more in our "Highlights" section above.

Riverdale (The CW), Tuesday 9 p.m. - "Chapter Ninety-Eighty: Mr. Cypher"

After being visited by a mysterious figure, the gang finds themselves faced with unexpected ultimatums.

Chucky (SYFY), Tuesday 10 p.m. - "An Affair to Dismember"

See more in our "Highlights" section above.

WEDNESDAY

Lost in Space (Netflix), Wednesday - Final Season

See more in our "Highlights" section above.

Hawkeye (Disney+), Wednesday - Episode 103

Stars Jeremy Renner as Hawkeye, who teams up with another well-known archer from the Marvel comics, Kate Bishop, played by Hailee Steinfeld.

Beebo Saves Christmas (The CW), Wednesday 8 p.m.

SPECIAL: When an efficiency-obsessed elf decides that Christmas would run better without Santa Claus, Beebo and his friends travel to the North Pole to help discover what truly makes Christmas meaningful.

Intergalactic (SYFY), Wednesday 10 p.m. - Episode 5

Genevieve and Drew kiss; the mutiny travels to Skog to find medical aid for Ash and realizes Emma can detect new aurum; Ash reveals their location to the Common World, leading to Emma's capture; Ash meets her father and learns that he framed her.

THURSDAY

Star Trek: Discovery (Paramount Plus), Thursday - "Choose to Live"

Captain Burnham and the crew of the U.S.S. Discovery face a threat unlike any they've ever encountered. With Federation and non-Federation worlds alike feeling the impact, they must confront the unknown and work together to ensure a hopeful future for all.

Ad Astra (FX), Thursday 8 p.m.

NETWORK PREMIERE: Thirty years ago, Clifford McBride led a voyage into space, but the ship and crew were never heard from again. Now his son must embark on a daring mission to uncover the truth about his father and a mysterious power surge that threatens the universe.

Ghosts (CBS), Thursday 9 p.m. - "Alberta's Fan"

Alberta is thrilled when a super-fan visits the mansion; Thor convinces Hetty to go on a walk that would hopefully spark a special memory.

Legacies (The CW), Thursday 9 p.m. - "Someplace Far Away From All This Violence"

The squad continues to work on helping Hope, much to her dismay; MG makes a last-ditch effort at helping, but things do not go as he had planned.

FRIDAY

Jurassic World Camp Cretaceous (Netflix), Friday - New Episodes

NEW EPISODES: Follows a group of six teenagers chosen for a once-in-a-lifetime experience at a new adventure camp on the opposite side of Isla Nublar. But when dinosaurs wreak havoc across the island, the campers are stranded. Unable to reach the outside world, they'll need to go from strangers to friends to family if they're going to survive.

Nancy Drew (The CW), Friday 9 p.m. - "The Burning of the Sorrows"

Nancy, Bess, Agent Park and Temperance have to join forces when an attempt to trap a killer ends up unintentionally unleashing a deadly supernatural entity that feeds on people's sorrows; Ace and Ryan discover a haunting at the historical society.

The UnXplained (History), Friday 9 p.m. - "Secrets of the Immortals"

Sacred waters with remarkable healing powers; ancient mystics who lived for hundreds of years; a scientific breakthrough may provide the answers to eternal life.

Day of the Dead (SYFY), Friday 10 p.m. - "To Anyone Who Can Hear My Voice"

The fortress of Paymart comes under siege as survivors are forced to fight for their lives or flee.

SATURDAY

Space Jam: A New Legacy (HBO), Saturday 8 p.m.

NETWORK PREMIERE: Trapped in digital space by a rogue AI, superstar LeBron James teams up with Bugs Bunny and the rest of the Looney Tunes gang for a high-stakes basketball game against digitized champions of the court — a powered-up roster called the Goon Squad.

Psych: The Movie (USA), Saturday 8:30 p.m.

NETWORK PREMIERE: After three years, the gang reunite when an assailant targets one of their own.

SUNDAY

Doctor Who (BBC America), Sunday 8 p.m. - "Flux - Part 5"

See more in our "Highlights" section above.

Legends of the Hidden Temple (The CW), Sunday 8 p.m. - "The Japanese Legend of Susano'o"

Four teams compete to win the chance at the Temple Run and $25,000.

Harry Potter: Hogwarts Tournament of Houses (Cartoon Network), Sunday 8 p.m. - "Ravenclaw v Slytherin"

Superfans of the "Harry Potter" franchise answer trivia questions about the intricately detailed universe; the winner of the competition earns the title of House Cup Champion.

Fear the Walking Dead (AMC), Sunday 9 p.m. - "Padre"

MIDSEASON FINALE: Alicia enlists Morgan's help to search for a new home for her people, but Morgan soon learns the search is more complicated than he imagined.

The Walking Dead: World Beyond (AMC), Sunday 10:14 p.m. - "The Last Light"

See more in our "Highlights" section above.

*TV listings via Zap2it, network and streaming listings.