BBC One

A small fish with a big imagination gets lost in the deep wide ocean, until he is saved by his own storytelling.

In Morriston Hospital in Swansea in 1994 a group of ordinary middle-aged Welsh men stepped into the unknown by taking part in the world's first medical trials for the drug that became Viagra.

Busker Fred and his cat Tabby McTat entertain and delight passersby with music across London. One day, Fred falls, injures his leg, and is whisked away in an ambulance, leaving Tabby alone on the city's streets.

imagine... follows celebrated British TV writer Russell T Davies as he prepares to return as the showrunner of Doctor Who – with two Doctors and bigger ambitions.

Peter Righton, once a respected child protection expert and social care worker, fell from grace when customs discovered illegal material being mailed to him from Europe. This led to the revelation that he was a founding member of the Paedophile Information Exchange (PIE). Further investigations uncovered that he had abused children at a boarding school. Shockingly, Righton confessed to past abuses to his child protection colleagues, but they failed to act on this information out of loyalty to him.

Michael Sheen faces the interview of a lifetime with The Assembly, a group of autistic, neurodivergent, and learning disabled people. Expect revelation, chaos, and a lot of laughs.

The spaceship Altares, with a photon drive capable of accelerating it to the speed of light, leaves an Earth-orbiting space station. The Altares crew, two families of scientific specialists, journey at light speed with time-dilation to Alpha Centauri, where they launch several satellites to transmit information on the Centauri star system back to Earth and guide future manned vessels in exploring. The Day after Tomorrow (also known as Into Infinity in the United Kingdom) is a 1975 British science-fiction television special produced by Gerry Anderson between the two seasons of Space: 1999. It stars Brian Blessed, Nick Tate, Joanna Dunham, Katherine Levy and Martin Lev. It aired in the United States on NBC as part of the network's Special Treat childrens series in December 1975, and in the UK on BBC1 in December 1976.

National treasure Max Boyce celebrates two major milestones - 50 years on stage and his 80th birthday, in a star-studded look at his incredible career as a comedian, singer, songwriter and 'people’s poet'. In a mix of documentary and performance, Max looks back at his achievements and lifts the lid on his private life at home in Glyneath. From the tragic events that shaped his life to his passion for rugby and his local club, this is a side of Max rarely seen. The programme mines six decades of archive material and features some of his most iconic songs and stories as well as contributions from Rob Brydon, Michael Sheen, Katherine Jenkins, Gareth Edwards and Cerys Mathews.

An uplifting insight into the lives of seven-year-old conjoined twins, who weren’t expected to live more than a few days. Cared for by their devoted father, the girls have defied all odds.

This engaging film follows three Asian aunties bringing Bradford’s old and young together for a coach trip – part of a unique project to preserve Asian culture.

Stanley Baxter's Picture Annual

A journey into the history, pageantry and characters that have shaped a Scottish phenomenon. Acclaimed actor Bill Paterson narrates the astonishing story of the Highland Games. From the battling clans to Queen Victoria's infatuation with her Highland subjects, the games have become a symbol of community and identity in Scotland and all across the world.

Jason Manford hosts a glittering musical celebration, with spectacular performances and special guests, including Beverley Knight, Nicole Scherzinger and Alfie Boe. Daniel Mays takes to the stage with Guys & Dolls, Alfie Boe returns to Les Misérables for a special one-off performance, Beverley Knight performs with some of the next generation of musical theatre stars, and the cast of Broadway sensation Hadestown present a UK television exclusive ahead of its West End debut.

The shores of Lake Kariba in the Matusadona National Park of Zimbabwe are a boundary zone between the territories of crocodiles, hippos, and lions. And sometimes this coveted lakeshore real estate is anything but peaceful. We look at the survival tactics of a lion pride living lakeside, as the boundry zone becomes a battle zone

UK police investigation into paedophiles sharing images of child abuse on the internet. This started as an FBI investigation into the Landslide website. FBI passed details to police forces around the world. In most countries, the arrests were made swiftly. UK police took their time, allowing paedophiles to destroy evidence. Most suspects were never investigated, including many prominent people.

Jane Corbin presents an investigation into the activities of the Wonderland Club global paedophile ring, which used computer technology to exchange child pornography. Including interviews with club members and with parents of their victims.

Nick Ross presents a reconstruction of the police investigation into the murder of 14-year-old runaway Jason Swift, which led to the uncovering of a sinister paedophile ring. Within days of the discovery of Jason's body, the hunt was on for the killer of another boy, later identified as 6-year-old Barry Lewis. The bodies of both boys showed traces of the kind of tranquillisers commonly used by paedophiles. Leads from Wandsworth prison eventually revealed that the ring may have been involved with as many as 20 murders of young boys. Next week's programme reconstructs the painstaking follow-on investigation called Operation Orchid.