Today Ultra Science: Fast Frozen Future. With global prosperity very much dependent on the weather, predicting future climates has become more important than ever.
Tune in and find out if accurate predictions are possible or whether the answer lies somewhere between Doris Stokes and Michael Fish.
Discovery Sci Trek, 7.30pm Leading Edge. Washington State in the wilds of north west America is home to a most unusual scientific experiment. Stretching as far as the eye can see is LIGO, a metal structure searching for the faintest of signals from the universe. Geoff Watts meets the physicists to find out what exactly they are looking for. Presumably, it's not digital reception to The Archers they're after.
BBC Radio 4, 9pm Friday Gardener's World. A little something for the weekend? Alan Titchmarsh gets his dibber out and goes from bed to bed preparing his garden for winter.
BBC 2, 8.30pm Saturday The Red Arrows. The story of the first Communist darts team to tour the north east of England? Alas no, but don't worry, it's about the famous fearless formation flyers.
Discovery Wngs, 7.30pm Sunday Scrapheap Challenge. The task in the second semi-final is to build a machine that will dig a hole through two 1m thick walls of different density so that each team member can crawl through. The Cat-alysts team includes civil engineer Tom Betts, who regular readers of this cutting edge column will know was mentioned a few weeks back. Has Tom been gorging himself on the spoils of victory after success in the last round? If he has, then they'll have to dig a wider tunnel.
Channel 4, 6pm Monday The Long Good Friday. Bob Hoskins stars as the civil engineer who because of a severe skills shortage has to work right through the Easter holiday. Helen Mirren costars as his long suffering wife who has to buy a second dog to accommodate all those unwanted dinners.
Channel 4, 10pm