TV tonight: Michael Portillo rides the railroad across Alaska

Great American Railroad Journeys

8pm, BBC Two

It seems that the former MP Michael Portillo is rarely to be found off a train these days, with two railway-themed series beginning on the BBC this week: one in the US and the other, starting on Monday, in Asia. Trusty directory in hand – the 1899 Appletons’ Guidebook to Alaska – Portillo begins his journey across the state, setting off from the mountain ranges of the Kenai Peninsula, which was once a Russian colony, to reach Anchorage. He even feeds a rescued sea otter along the way. Ammar Kalia

The Masked Singer

7pm, ITV

The mascots continue to be unmasked in this absurdist singing series. With former England footballer Teddy Sheringham revealed to be behind the Tree outfit last week – disappointing fans who initially thought it was David Beckham – this week sees Donny Osmond guesting on the judging panel. AK

Bone Detectives: Britain’s Buried Secrets

8pm, Channel 4

Palaeobiologist Tori Herridge comes across a gruesome sight this week: the remains of more than 100 men buried beneath the site of a proposed car park outside Andover. They date the skeletons to the Anglo-Saxon era and investigate how this mass grave came to be. AK

Tony Robinson’s History of Britain

8pm, Channel 5

Baldrick’s exploration of everyday history reaches the second world war where he talks to Babs, an evacuee who returned to London, and gives us an idea of what it was like for rookie soldiers to fight their first battles. Elsewhere, he meets a woman who lived on the occupied Channel Islands. Hannah Verdier

Wisting

9pm, BBC Four

The multilayered Nordic noir comes to an end in a typically understated yet no less heart-pounding manner as Detective William Wisting fights to clear his name after last week’s revelations of tampering in a historical case. Meanwhile, his daughter Line continues the hunt for the killer alone. AK

Casualty

9.20pm, BBC One

The latest dramas from Holby: Marty falls in love with Jack, an older man, much to Marty’s father’s annoyance, but that is far from the only unpleasantness that awaits him. Meanwhile, guilt-ridden Charlie questions his decision to put Duffy in a care home but a patient’s travails may signpost a solution. Ali Catterall

Film choice

Bone Tomahawk, 11.05pm, Film4

Brawl in Cell Block 99 director S Craig Zahler’s sun-parched, ferociously violent tale of cowboys and cannibals is like The Searchers crossed with Night of the Living Dead. Kurt Russell is the staunch sheriff Hunt, who gathers a determined little posse to rescue town doctor Samantha from her abductors. Paul Howlett

Live sport

FA Cup Football: Brentford v Leicester City 12.15pm, BBC One. A fourth-round tie.

Premiership Rugby: Bristol Bears v Gloucester 2.30pm, BT Sport 2. Top-flight game at Ashton Gate.

FA Cup Football: Hull City v Chelsea 5pm, BT Sport 1. Frank Lampard’s side travel to the KCOM Stadium.