Ends 10.50.

The Prince of Atlantis
Animated adventures. Akata and his friends encounter Dr Droog. (R) (S)

7.25 Dennis the Menace
Animated hell-raising fun with the errant young boy and his dog. (R) (S)

7.50 Blue Peter
Simon joins the crew of a submarine. With sign language. Shown yesterday at 5pm on BBC1 (S)

8.05 Doctor Otter
Animated woodland adventures. A chameleon is discovered by the Donfuss children. Repeated at 1pm (R) (S)

8.25 Oakie Doke
The woodland adventures continue. (R) (S)

8.35 64 Zoo Lane
Lucy hears the story of a lonely polar bear who finally makes a friend. (R) (S)

8.45 Penny Crayon
Penny draws a 'statue from a waxworks' house of horrors exhibit. (R) (S)

9.00 Teletubbies
In a double bill of tubby fun, a carpet appears in Teletubbyland, and some children play hide-and-seek. (R) (S)
BBC video: Teletubbies 2 video box set, containing Musical Playtime and Nursery Rhymes, price £12.99

9.50 Playdays
Pre-school fun. Peggy Patch and her friends find plenty of treasure washed up by the tide on the Isle of Barra. (R) (S)

10.10 Tweenies
A double bill in which Doodles learns the value of being honest, and then Max gets to work on a very special boat on the River Thames. (R) (S)
BBC CD: Tweenies Christmas Album is available from retailers

Repeats are not indicated.

10 50 Megamaths: Measure - Sports Day
(ages 7-9)

11.10 Look and Read: Spelling Strategies
(part 1) (ages 7-9)

11.30 Science Zone: Living - Fit for Life
(ages 9-11)

11.50 Landmarks: Portrait of Europe - Southern Spain
(ages 9-12)

12.10 Focus: Growing Up - What's Happening to Me?
(ages 9-13)

Business updates.

Shown at 8.15am.

Highlights from Lakeside of last night's second-round clashes. In last year's tournament, John Walton continued his imposing form by crushing Mervyn King 3-0 to take another step on the way to the title.

Analysis of today's political proceedings at Westminster, presented by Zeinab Badawi.

(Contact details Wednesday)

UK Today) Weather

More of yesterday's second-round action with the darts world's finest male and female players battling forthe total available prize money of almost £270,000.

More contestants are challenged to create 20-minute meals by Ainsley Harriott.

More acerbic put-downs from Anne Robinson as she hosts the elimination quiz.
(Repeated at 12.30am on BBC Choice)

Whine, Whine, Whine. Tiring of Clark's lame lies, Lois decides each must make a major decision.

The Body. Buffy and the group are overcome by grief when tragedy robs them of someone they hold dear.
Repeated tomorrow 12.30am WEBSITE: www.bbc.co.uk/cult

Second in the new series in which Ray Mears shows how to survive in some of the most inhospitable places on earth. Belarus. The ancient forests of Belarus are the last reminder of how Northern Europe once looked. In the vast wilderness of the Naliboki forest, where thousands of Jews lived off the land after escaping the Nazis. Mears embarks on an emotionally draining experience in which he tracks wolves and bison, raids ants nests for larvae, and is shown how to weave a pair of lime-bark shoes by a 70-year-old forester. Producer Martin Pailthorpe ; Series producer Dick Colthurst

Helike- the Real Atlantis. In 373 BC, a huge earthquake and seismic sea wave destroyed and submerged the Greek city of Helike. Its remains have proved as elusive as those of Atlantis, whose myth the catastrophe may have inspired. Armed with new geological evidence, archaeologists believe they have solved the scientific detective story and have found traces of what may prove a Greek Pompeii: a frozen moment of life from the height of classical civilisation.
Producer Zoe Heron ; Executive editor John Lynch WEBSITE: www.bbc.co.uk/science/horizon

First in a new five-part series following the lives of families with genetic diseases as they make decisions about whether to undergo tests and try revolutionary medical treatments. The Gorry Family. For years, members of the widespread Gorry family have fallen victim to "Sudden Death Syndrome", the result of a rare rogue gene. There's now a solution, but can family members be found in time? John Hannah narrates. Producer Steve Greenwood ; Executive producer Tessa Finch WEBSITE: www.bbc.co.uk/genes; Ceefax: page Free Booklet: ring the Action line on [number removed]

Presented by Kirsty Wark.

Then Party Broadcast
By the Liberal Democrats.
(W)

Highlights from Frimley Green, Surrey, of today's quarter-final matches. Presented by Ray Stubbs.

Repeats are not indicated.
Open Science 12.30 Final Frontier 27966 1.00 Hollywood Science 8507121 1.10 The Lapedo Child
2.00 The Science of Climate? 58879 2.30 A Formidable Foe 60614 3.00 Sickle Cell - a Lethal Advantage
Curriculum Development 3.30 Explicit Learning Plus: Listen to This Languages 4.00 Spanish Journey (parti)
Working in Health and Care 5.00 Computer Skills Open University 6.00 Passing Judgements
6.30 The British Family - Sources and Myths