Ends 8.00.

The Silver Brumby
When Charlie's grandfather gets trapped by the snow, Thowra, Storm and Arrow come to the rescue.

6.25 UBOS
Gus realises that Zarlak is stealing everything that's sharp in order to make the Morties seem dull.

6.45 Dennis the Menace
The naughty boy runs a class in how to understand adults.

7.10 ChuckleVision
Paul has an idea - can he create a machine that will counteract Maddy's?
Writer Emma Millions

7.30 Blue Peter
Going underground: Simon visits salt mines and the Cabinet War Rooms, gets lost on London Underground and goes cave diving in Somerset.
Signed. Shown yesterday at 5pm on BBC1 [web address removed]

7.55 Newsround

Ends 10.30.

Big Cook, Little Cook
Ben and Small have to look after Fluffy the rabbit for the weekend.

8.20 Tots TV
Tom and Tiny hear odd squeaky sounds.

8.30 Bobinogs
Always try your best and never give up is today's motto on the educational show.
Nib, Ogi and Bobin learn how to persevere.
First shown on BBC Wales

8.45 Boo!
Can anyone detect Boo in the library?

9.00 Balamory
Why hasn't Miss Hoolie received Spencer's letter? PC Plum is soon hot on the trail.
Writer Johanna Hall
For cast see Wednesday BBC1

9.20 SMarteenies
More examples of pattern design, another big picture, plus a look at works hanging in the SMarteenies gallery.

Followed by CBeebies Birthdays

9.40 Tweenies
Judy finds her way around the London Underground.
Tweenies magazine: £1.50, monthly

10.00 Teletubbies
Amy makes some pasta and a ball of string appears.

Repeats are not indicated.
10.30 Hands Up! (ages 9-11) The Chronicles of Narnia: the Magician's Nephew (Programme 1) Signed 7907252

10.45 Pathways of Belief (ages 7- 9) Islam: Allah - Creator and Provider 7902707

11.00 The Way Things Work 3 (ages 7-9) Heating 9767962

11.15 Pathways of Belief (ages 7-9+) Christianity Creation

A look at the Christian view of creation, including the concept of God as the creator and designer of the earth. Show more

The latest proceedings from the House of Commons.

Business news with Adrian Chiles and Adam Shaw, plus another look at the Liverpudlian traders attempting to interest Latvians and Lithuanians in British merchandise.
[web address removed]

Live coverage of the fi rst world championship semi-final from the Crucible Theatre in Sheffield. Played over four sessions, the match is the best of 33 frames.
Introduced by Ray Stubbs , with Steve Davis and John Parrott. Clive Everton, Dennis Taylor , Willie Thorne and John Virgo provide the commentary. www.bbc.co.uk/snooker BBCi: digital viewers can access a news and statistics service via the red button on their handset

Mother's Day. When Jazz and his wife try unsuccessfully to conceive, they ask Will to father the baby.

The second semi-final gets under way this evening at the Crucible Theatre in Sheffield.
It was at this stage last year that Ken Doherty produced one of the greatest comebacks in Crucible history to beat England's Paul Hunter 17-16 and reach the final. With the Irishman trailing 15-9 at the start of play, Hunter only needed two frames to clinch the tie, but Doherty showed remarkable resolve to take the first five frames of the session. The Englishman had victory in his sights when he moved 16-14 ahead, yet Doherty dug deep once more to produce a sensational finish. After the match, the relieved victor revealed that he used the fearfrom his near-collapse against John Higgins in the previous round to spur him on to this amazing win. Ominously for Doherty, his opponent in the final, Mark Williams , had made short work of England's Stephen Lee 17-8 in the other semi-final.
Hazel Irvine introduces the play, with commentary by Clive Everton , Dennis Taylor , Willie Thorne and John Virgo. www.bbc.co.uk/snooker
BBCi: digital viewers can access extra live coverage throughout the day, plus a news and statistics service, via the red button on their handset

After taking to the air over the dramatic landscape of the west coast of Scotland, Chris Beardshaw identifies plants that are perfect for a damp and shady garden. Director Richard Sinclair ; Series producer Kathy Myers
(Revised repeat) (AD)

Further coverage from tonight's second semi-final at the Crucible Theatre, Sheffield. The match is decided over the best of 33 frames. Hazel Irvine introduces play, while Steve Davis and John Parrott offer their unique insight into the most prestigious event in the snooker calendar. www.bbc.co.uk/snooker
BBCi: digital viewers can access extra live coverage throughout the day, plus a news and statistics service, via the red button on their handset

In-depth analysis of the day's top news stories, presented by Gavin Esler.

Spain. Humiliation looms when Jeremy takes on Europe's oldest race, the Basques, at games of strength. Elsewhere in Spain he gets splattered at a tomato festival, launches a one-man protest against EU subsidies, and - more seriously - witnesses the aftermath of a car-bombing.
Series director Dennis Jarvis ; Series producer Andy Wilman

Ray Stubbs introduces highlights from the first session of the first semi-final.

www.bbc.co.uk/ieamingzone
Schools Repeats are not indicated.
2.00 GCSE Bitesize Revision History: Schools' History Project Medicine through the ages and the American West.
4.00 GCSE Bitesize Revision Geography: Physical Global Issues. Covering the national curriculum key elements - developmental issues, world trade, aid, population, global tourism and energy.