Ends 9.15.

Playdays
Morris and Milly visit a garden at the bottom of the sea. (R)

7.20 Pocket Dragon Adventures
Duke Drake has been turning animals into stone in the forest. (R) (S)

7.35 Snorks
Junior accuses Allstar of being a coward. (R) (S)

8.00 50/50
The first in a new series of the action-filled game show.
Shown on Monday on BBC1 at 4.10pm (S) (W)

8.25 Albert the Fifth Musketeer
Fun with the French 17th-century hero. (R) (S)

8.50 Yoho Ahoy!
A double bill of piratical fun. (S)

9.00 Postman Pat
Postman Pat paints the ceiling. (R) (S)

War of the Gods (parti). Apollo meets the sole survivor of an alien culture. Concludes tomorrow.
(R) (S)

A strong wind blows Tinky Winky's skirt, Dipsy's hat, Laa-Laa's ball and Po off her scooter and then follows them inside. (R) (S)

Jake can't decide what his favourite song is for the Tweenies' own version of Top of the Pops. (R) (S) (W)

Animated fun with the tiny man. (S)

Adventure starring Donald Sinden. Sir Anthony Ross hires an academic to help him locate his son who has gone missing in the Arctic. The only clues to his whereabouts are a mysterious map carved on a whale-bone and a page from an old journal. Reviews pp 66-71. Director Robert Stevenson (1974, U) (S) ***

Consumer news.
CEEFAX: page

Mario persuades Ryan to become a drug pusher. Nikki wins a singing contest. (R) (S)

On the eve of Aintree's three-day Grand National meeting, Clare Balding introduces coverage of the 2.00 and 2.30 races from
Ascot. Jim McGrath , Richard Pitman and Peter Scudamore commentate. Continues at 2.55 on BBClwith racing from Aintree tomorrow at 2.05pm on BBC1.
(W)

Coverage of today's Prime Minister's Questions.
Series editor Jon Williams (S) CONTACT DETAILS: on Tuesday

UK Today); Weather (S) (W)

Against-the-clock cookery, with Ainsley Harriott. (S)

General-knowledge quiz, with Anne Robinson. (S) (W)

Steve Rider previews the first of this year's four golf majors, the US Masters. The world's top golfers will be competing for the coveted green jacket, including last year's winner Fiji's Vijay Singh , whose victory deprived Tiger Woods of an unprecedented Grand Slam of major tournaments. US Masters coverage begins tomorrow at 9pm.
Producer Josephine McCusker (S)

A light-hearted look at what makes a perfect parliamentary candidate. As constituencies all over Britain gear up for an election, this humorous search uses clips from 40 years of elections and interviews with battle-hardened politicians to build up a profile and computer-generated impression of the perfect fantasy candidate.
Producer Jonny Clothier (S) (W)

Herne Hill. Confronted with a cluttered family house in London's Herne Hill , Laurence Llewelyn-Bowen comes up with a warm, friendly and family-orientated style. Meanwhile, Diarmuid Gavin fails to persuade the Fairhurst family that a motorway-style flowering flyover is a natural look.
Director Dave Smith ; Series producer Amanda de Ryk (S) (W) WEBSITE: www.bbc.co.uk/homefront
BBC BOOK: Home Front in the Garden by Diarmuid Gavin , hardback £18.99

This week's programme on the north-west London suburb focuses on two men who grew up on Stonebridge housing estate. Ex-drug dealer turned musician Dolomite was influenced by the estate's crime culture and his first single calls for an end to gun crime, while Pierre Lewis has to decide between a college education and street life.
Series producer Jackie OsetTutu ; Executive producer Debbie Christie (S) (W) 812 78 WEBSITE: www.bbc.co.uk/harlesden

Analysis of the news, with Jeremy Paxman. (S) (W)

The Show. The nightly series continues by following artists Jake and Dinos Chapman , Tim Noble , Sue Webster and curator Max Wigram as they prepare for shows. (S) (W)

With Andrew Neil.

Repeats are not indicated.
Open University 12.30 A New Sun Is Bom (pt 1) (S) 53921 1.00
Living with Drought (S) 9255230 1.50 EverWondered?
National Test Revision 2.00 Revisewise at Home KS2 Maths Languages 4.00 The French Experience (parts 13-16) Working for Yourself 5.00 Money Basics
Open University 6.00 Power and Vision (S) 87476 6.30 Desertification - Threat to Peace? Ends 7am. (S)