BBC Four HD Tuesday

Fred Dibnah demonstrates the engineering and design skills that shaped Scottish baronial style, visiting buildings of note such as Glamis Castle and the House of Dun

This edition explores why two tunnels are better than one and follows the catenary team every step of the way as they fix the overhead cables in the 'wet area' of the tunnel

Tom and Barbara try to make clothes out of nettles and wool, while Jerry has his eye on becoming the next managing director of JJM

Jim Hacker prepares to make his first public broadcast as prime minister, but has trouble speaking to camera

Robert Robinson hosts a game of word definitions and deceptions. Captains Frank Muir and Patrick Campbell are joined by Tom Baker, Alan Coren, Gabrielle Drake and Miriam Stoppard

Joseph Cooper invites viewers to match their musical wits against Judith Jackson, Robin Ray and Patrick Moore. With guest musician Louis Kentner

Following a Russian teacher who goes undercover to expose how rural primary schools have become recruitment hubs for war as Russia launches its full-scale invasion of Ukraine

The historian uncovers the truth about Spain's hero El Cid, investigates the horror of the Spanish Inquisition and discovers a story about one of his own ancestors

Author Stella Duffy sets out to produce her own novel for Mills & Boon, the company that has become one of the biggest names in romantic fiction

Fred Dibnah demonstrates the engineering and design skills that shaped Scottish baronial style, visiting buildings of note such as Glamis Castle and the House of Dun

This edition explores why two tunnels are better than one and follows the catenary team every step of the way as they fix the overhead cables in the 'wet area' of the tunnel

Part two of two. Historian Jonathan Foyle explores how the king's choices in art and architecture provide clues to his mental state, as he despaired of ever fathering an heir