TV Tonight: Murder and romance in the Death in Paradise spin-off | television

Back to heaven

8pm, BBC One
In the second season of this Australian spin-off of the hugely popular Death in Paradise series, Detective Mackenzie Clarke (Anna Samson) returns to her hometown, Dolphin Cove, and there’s a new murder: a scientist working at a shark research lab has been found dead on his boat. Plus, there’s the whole drama going on with Mackenzie’s ex-fiancé, Glenn (Tae Hara), a forensic pathologist. Holly Richardson

An unspoken world

7.30pm on Channel 4
Latin America correspondent Guillermo Galdos sends this timely report from Colombia, where conflict has escalated this year between the government and armed groups, and between the groups themselves. Nine years after the 2016 peace agreement, he examines why and how brutal drug violence persists. Hannah J. Davis

Boundary line

9pm on ITV1
The final two-part story means another contrived case to unite two detectives from Ireland and Northern Ireland: a hurling player receives a stick to the head, having crossed the border for a match. Most excitingly, nervous Northern Irish cop DCI Boyd (Eoin Macken) finally confronts the man he believes shot his father. But what if it’s the wrong guy? Jack Seale

The Walking Dead: Daryl Dixon

9pm Sky Max
The second episode of the Walking Dead spin-off series has Daryl (Norman Reedus) and Carol (Melissa McBride) washed up on the Costa da Morte in Spain, never to return home to America. They spot a young couple who take them back to their community, but even though Daryl and Carol have a place to stay for a while, it’s not as safe as it seems — and not just because of the zombies. Human resources

How are you? It’s Alan Partridge.

9.30pm on BBC One

Steve Coogan and company triumph once again with this exploration of mental health where the most unstable person on screen is also our guide. Ahead of next week’s finale, newly single Alan dips his toe into online dating (with Lynn’s help, of course) and religion to help him get out of the pickle he swore he wasn’t in. HJD

The Graham Norton Show

10.40pm, on BBC One
Keira Knightley, who now stars as a slightly dazzling Guardian reporter in the silly Netflix film The Woman in Cabin 10, is on Graham’s couch. They were joined by Malala Yousafzai, Amy Lou Wood and Chris McCausland. The music comes from Mumford & Sons with Hozier. Human resources

Choose a movie

Companion (Drew Hancock, 2025), 8.10am and 8pm, premiere at Sky Cinema

Jack Quaid became remarkably good at making bad indie films during his hiatus from The Boys. After the gory, noisy Novocaine comes Companion, which is either violent sci-fi or a very accurate representation of what life will be like 30 years from now. Quaid plays Josh, a “nice guy” who starts getting into trouble when his robot sex device breaks itself. On the one hand, Companion is a film about the consequences of coercive control. On the other hand, this is a scary warning about what will happen when the AI ​​we use realizes that we are not being very polite to it. Stuart Heritage

Crawl (Alexandre Aja, 2019), 1.25am, Channel 4
Viewers don’t exactly want to watch horror movies this Halloween, but if you’re looking for something under the radar that delivers real scares, Crawl is the movie for you. Brilliantly, Alexandre Aja’s film is largely set in the crawl space beneath the house. What bothers those stuck in it is that it is full of crocodiles. It’s a delicate balance, extracting the maximum risk from the premise without it becoming implausible, but Crawl achieves it with aplomb. Fortunately, there’s a sequel on the way… although how to up the ante on this is anyone’s guess. Sh

Live sports

FA Cup: Luton Town v Forest Green Rovers, 7pm, TNT Sports 1 The first round of this year’s competition is drawn at Kenilworth Road.