Looking for a Tuesday night of diverse programming on BBC Four? Here’s a lineup that takes you from the iron‑clad history of railways to the familiar laughs of classic sitcoms, with a dash of historical insight and photographic exploration.

The Architecture the Railways Built

Tim Dunn visits the former HQ of London Underground, 55 Broadway, which was the capital’s first skyscraper, and sees the timber‑framed Barmouth Bridge in north Wales. With its sharp visuals and engaging narration, this 40‑minute documentary still entertains while delivering a solid dose of engineering marvels.

The Architecture the Railways Built

The Flying Gardener

Chris Beardshaw visits inspirational gardens by helicopter in Devon, helping Carol Cooper and her husband Stephen develop a spring woodland garden. A light, exploratory piece that holds up well for garden lovers and those looking for a breezy break.

To the Manor Born

DeVere hosts the traditional hunt ball but asks Marjory to organise it instead of Audrey, who in turn arranges an exquisite revenge. A nostalgic chuckle‑factory that still delivers the charm of 1970s British humor.

To the Manor Born

Keeping Up Appearances

Hyacinth volunteers to meet a special guest for the ladies’ luncheon club, a retired commodore. Its quirky social satire holds up well, though the pace may feel dated to younger viewers.

Keeping Up Appearances

How the Celts Saved Britain

Dan Snow reveals how the Irish saved Britain from cultural oblivion in the Dark Ages, as missionaries brought literacy and technology to Scotland and England. A compelling historical narrative that still stays engaging, especially for those curious about Britain’s roots.

How the Celts Saved Britain

Britain in Focus: A Photographic History

How the colour boom and digital revolution have shaped modern British photography. A thoughtful look at visual culture that holds up as a solid documentary for photography enthusiasts.

I Am Martin Parr

Discover the maverick behind some of the most iconic images of the past century. A fascinating behind‑the‑lens journey that still captivates viewers interested in documentary style.

I Am Martin Parr

The Brits Who Designed the Modern World

Brenda Emmanus meets and profiles ten great living British designers, to find out what inspires them and explore how they have responded to society’s evolving tastes. A stylish exploration of design that holds up well for modern aesthetics enthusiasts.

The Brits Who Designed the Modern World

Bottom line: BBC Four offers a balanced mix of visual storytelling and nostalgic comedy this Tuesday. Whether you’re into architecture, history or a good laugh, there’s something that will keep you engaged.