PICK OF THE WEEK TV extra Minding your Ps and cues with four lunatics in your ear

Wanderlust (BBC1, 9pm)

Duke and Duchess of York were expecting their second child, Margaret Rose Windsor, a princess of the largest empire the world had ever seen. Her life would be the talk of millions in the decades to come. This two-part documentary profiles the life and loves of a woman who reflected the social and sexual revolution that transformed Britain during the 20th century. With archive footage and revealing interviews, cameras and anecdotes flesh out Margaret’s life as she redefined the public’s image of the modern princess.

Joy and Alan put their daring plan into place, with surprising results, but how will other people react when they’re told the truth about their actions? Meanwhile, their son Tom shocks his best friend Michelle with a peculiar proposal and a disastrous date for eldest daughter Laura ends with a shocking revelation. Drama, starring Toni Collette as a therapist and Steven Mackintosh as her husband.

WEDNESDAY Ill Gotten Gains (BBC1, 7.30pm)

You could be forgiven for thinking that Deep Rummage was an indie folk band, rather than a team of law enforcers. Here cameras follow the story of the largest drug bust in British waters as the tug boat MV Hamal is stopped by border force and searched by said team. Over in Merseyside, a drug-dealing gang is raided and authorities seize everything they can find at the team’s houses. Plus, a look at how criminals’ assets are sold at a proceeds of crime auction.

The Supervet (C4, 8pm)

In the first of a new series, Professor Noel Fitzpatrick treats a giant Newfoundland puppy with a painful knee and shoulder. What appears straightforward quickly turns into a much bigger concern and Noel and his team are challenged to invent not one but two implants for her. Meanwhile, a rescue black Labrador called Moogi is in need of treatment for severe elbow arthritis and a golden Labrador born with a deformed front paw is offered a bionic solution in the form of a unique, custom-made prosthesis.

Joanna Lumley’s Silk Road Adventure (STV, 9pm)

The eponymous host is off on her travels again, following in the footsteps of David Baddiel, in an exploration of the Silk Road. Her first stage is in Venice, where Joanna discovers how the Silk Road helped the region’s merchants and the city state itself grow rich and powerful. She witnesses evidence of Marco Polo’s silk road booty and sees how silk cemented Venice’s reputation as a centre of luxury and wealth. Later she’s off to the Balkan country of Albania, and Turkey, starting in Istanbul. It’s a pivotal Silk Road city on the crossroads of Europe and Asia. There’s time for a look round Cappadocia, where the amazing rock formations create a unique landscape that became both a sanctuary for travellers and the early Christians. After a 14-hour journey to the far east of Turkey, she enjoys a spot of cheese-making before heading into the highlands close to the Georgian and Armenian borders.