There's a World Cup Preview ahead of tomorrow's opening game, a new series on Earth's biggest beasts, and a Panorama special on Putin's Russia . . .

Pick of the Day

World Cup Preview, 10.45pm, BBC One

Once every four years, hundreds of millions of people - billions, even - become social hermits and spend a large chunk of summer consuming football's favourite competition, the World Cup.

Ahead of tomorrow's opening game (which is traditionally a drab 0-0 draw), Gary Lineker is joined in Moscow by Alan Shearer and Jermaine Jenas to look ahead to one of the world's great sporting showpieces.

Can a Neymar-led Brazil lay to rest their traumatic 7-1 Rio rout by the Germans in the 2014 semi-finals? Will Argentina coach Jorge Sampaoli be able to harness the attacking brilliance of Lionel Messi, Sergio Aguero and Gonzalo Higuaín?

Then there's Spain, France, Belgium, Uruguay and Portugal – plus there are always going to be a few surprises over the course of the competition as some teams find momentum and others can't.

New or Returning Shows

The Walking Dead, 11.50pm, RTÉ2

Season eight of the Andrew Lincoln-starring zombie apocalypse drama finally arrives on terrestrial TV. But it's looking a bit tired at this stage.

As usual, it's about staying alive in a constant battle between the living and the undead. Rick and his group, along with the Kingdom and Hilltop, have banded together to bring the fight to nasty Negan and the Saviors.

Big Beasts: Last of the Giants, 9.00pm, Sky One & NOW TV

This new three-parter sees biologist/adventurer Patrick Aryee check out the biggest animals on Earth as he discovers why size matters in the natural world.

The series begins in the Americas, where Aryee finds out more about the sperm whale, the planet's largest predator; comes face to face with grizzlies and gets up close and personal with the anaconda – the world's biggest snake.

As well as revealing how these giants are shaping their environments, he checks out the Americas' megafauna of yesteryear, including the Titanoboa – a snake the length of a bus.

Ending Tonight

Elvis: The Searcher, 10.10pm, Sky Atlantic

The concluding part of this HBO documentary about the man who brought rock 'n' roll to the masses takes up when Elvis returned home after his stint in the army.

During his time away on military service, the landscape of popular music had moved on – and there were even more radical changes down the line. How would the King react?

New to Download

Champions, Netflix

Here's the latest comic offering from Mindy Kaling. Anders Holm plays Vince, a charismatic gym owner, who is living every bachelor's dream with his younger brother Matthew (Andy Favreau) in Brooklyn, New York.

He lives a simple life, dates an endless string of women, until his high school fling Priya (Mindy Kaling) drops off their 15-year-old son Michael (JJ Totah) so he can attend a city school for super-talented kids.

Don't Miss

Putin's Russia with David Dimbleby, 9.00pm, BBC One

With the World Cup starting tomorrow in Russia, David Dimbleby returns to a country he first visited when Boris Yeltsin came to power over 25 years ago.

For 18 of those years, Vladimir Putin has ruled the largest country on earth, and he has another six years ahead. This Panorama special asks what Russians see in him, and how has he held on to power so long.

Dimbleby talks to an eclectic mix of Putin's supporters; joins children as young as seven learning to load and shoot guns in a patriotic youth club, and a group of young Muscovite fans of the president who are trying to cash in on the Putin brand.

He also hears from opposition protestors, lawyers and journalists who reveal the extent and ruthlessness of the Kremlin's autocratic rule.