: What to Watch.

Big Brother - The Live Final (S4C, 8.30pm/10pm)

This is it. This is the moment when you can vote for your favourite contestant in the Big Brother household and help them win pounds 70,000.

For weeks we've tried to resist the allure of reality TV. But how could we? The backstabbing would put Nasty Nick to shame and some of the stupidity on display justifies the Government's decision to invest millions in the hope of improving the education system.

Ratings soared after PJ and Jade fumbled under the sheets, Alex snogged Adele and Sandy fled over the walls.

Admit it. This has been great entertainment and tonight we see who is the nation's favourite. Imagine the horror if it turned out to be Jade.

Tin Gods (HTV, 10.30pm)

Has Wales ever really warmed to Prince Charles? That is the question posed in tonight's episode of Tin Gods.

He was invested as Prince of Wales at Caernarfon Castle in 1969. But not everyone celebrated. There were protests and anti-monarchy songs sung by nationalists in the streets.

He was sent to Aberystwyth to learn Welsh, but critics still claim that he has never taken much interest in Wales.

Other figures studied in this new series of Tin Gods are Catherine Zeta Jones, Tom Jones, Welsh First Minister Rhodri Morgan, historic hero Owain Glyndwr and architect Frank Lloyd Wright.