Cracking Italian crime drama Gomorrah is back, as is The Supervet - meanwhile there's the last-ever episode of BBC dramedy, Mum . . .

Pick of the Day

Gomorrah, 9.00pm, Sky Atlantic & NOW TV

The critically-acclaimed Naples-set crime drama, inspired by the non-fiction book of the same name by Roberto Savioni, returns for a fourth season.

The story picks up right where the previous run's cliffhanger left off, as a devastating event pulls Naples to the verge of all-out war.

The only way crime boss Genny Savatano can maintain balance ion the city is to let a new player enter the game: the Lavante family, headed by Gerlando.

The Levantes hold sway over the north of Naples and have infiltrated every institution there. But once balance in the city has been restored, Genny has one more surprise in store.

New or Returning Shows

The Supervet, 8.00pm, Channel 4

Professor Noel Fitzpatrick is presented with an extraordinary range of often traumatic injuries and conditions in this brand-new run.

Rebecca and Chris are devastated when their four-year-old pug and beagle cross Barney is hit by a bus, crushing an ankle and causing extensive damage to his leg.

Fitzpatrick fears the puggle's wound poses a serious infection risk, and he has lost 40 per cent of the bone in the damaged leg, so he creates an innovative two-tier treatment, involving an external ankle frame for support.

Here's a great moment from a few years ago:

Hometown, 11.40pm, BBC One

Award-winning journalist Mobeen Azhar moves back to his hometown of Huddersfield to cover the death of Mohammed Yassar Yaqub.

What starts as a straightforward assignment takes an unexpected turn as Mobeen is faced with a wall of silence. A stabbing, followed by shots fired in the streets Mobeen grew up in suggest that there is a much bigger story in town.

New to Download

Beats, Netflix

A reclusive teenage musical prodigy forms an unlikely friendship with a down-on-his-luck high school security guard.

United by their mutual love of hip hop, they confront the demons of their past and try to break into Chicago's music scene.

The Edge of Democracy, Netflix

Here's a cautionary tale for these times of democracy in crisis - the personal and political fuse to explore one of the most dramatic periods in Brazilian history.

Combining unprecedented access to leaders past and present, filmmaker Petra Costa witnesses their rise and fall and the tragically polarized nation that remains.

Ending Tonight

Mum, 11.15pm, BBC One

In the season three finale - which is also the last-ever episode - it's Derek’s birthday, so Cathy and the family come together to get the house ready for a party in his honour.

Here's how the show was first introduced:

Don't Miss

Savage Builds, 10.00pm, Discovery

One of the many things I wanted to do when I was a kid was to be just like Tony Stark, and build my own Iron Man outfit.

The Marvel Comics' character has enjoyed immense popularity in recent years through the movies starring Robert Downey Jr. It's all fiction. Well, until now.

In the opening episode of this new series, Adam Savage, former co-host of the engineering series Mythbusters for 14 seasons, gets the Colorado School of Mines to produce a 3-D print of an Iron Man suit.

What a time to be alive.

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