6.30 Maths: Least Squares

6.55 Electrons and Atoms

(to 7.20)

The Embassy
World Professional Snooker Championship from the Crucible Theatre, Sheffield. Seventh day
The last 16 players from a field of 103 are now engaged in a long, tense battle to win the world crown and a first prize of £60,000.
Starting this morning's session will almost certainly be the present champion,
STEVE DAVIS , against DAVID TAYLOR. Also seeded to play are much-fancied JIMMY WHITE and TONY MEO.
And at 2.30* Snooker Break, introduced by DAVID VINE. Write to Snooker Break, BBC Television, Crucible
Theatre, 55 Norfolk Street Sheffield Sl IDA.
Then this afternoon's session begins with the prospect of an exciting match between two former world champions,
ALEX HIGGINS and TERRY GRIFFITHS , and, if the experts are correct, TONY KNOWLES and DOUG MOUNTJOY should be carrying on their second-round tussle. Remember it's the best of 25 frames.
Introduced by DAVID ICKE Commentator TED LOWE
JACK KARNEHM , CUVE EVERTON

with subtitles, followed by Weather

Five programmes
1: First Impressions
Steve Blacknell looks at first impressions and how they can sometimes make the wrong impression - especially at job interviews. How can you prevent your job chances going out the window the moment you walk through the door?
Producer TONY MATTHEWS
Director STEPHEN MOSS

How does a nightmare begin? For David Vincent it began at four in the morning, looking for a short-cut he never found.
What he found instead were creatures from another world....
Labyrinth
David Vincent gains possession of vital evidence in his war against the 'invaders' - an alien's x-rays. He takes them to Dr Samuel Crowell , head of a UFO research project, but finds the aliens have woven a tangled web of deception to discredit him in Crowell's eyes.
Written by ART WALLACE
Directed by MURRAY GOLDEN

[Starring] Phil Silvers as Sergeant Bilko

Bilko gets transferred to a fort full of suckers and Colonel Hall gets a super-efficient sergeant to replace him. So why aren't they happy?

The Embassy
World Professional Snooker Championship
The probability is that STEVE DAVIS will be completing his second-round match this evening, and competing in next week's quarter-finals. Also in the programme, the latest news of this afternoon's match, expected to be between
JIMMY WHITE and TONY MEO. Introduced by DAVID VINE

Topol journeys to the heart of the Negev desert for a reunion with a family of Bedouin Arabs who saved his life 30 years ago-and finds they are one of the few tribes who still wander in the wilderness in time-honoured style, with their camels and flocks of sheep and goats.
Film cameraman JOHN Williams Film editor MIKE DUXBURY Director CHRIS WRIGHT
Producer PETER HERCOMBE

The Embassy
World Professional Snooker Championship
Further coverage

Star Paws
Since the birth of advertising, animals have sold objects. A winsome wide-eyed puppy sitting by a phonograph sold gramophone records. A shaggy dog called
Duke is immemorially associated with a brand of paint. Pretty cats lick their whiskers on our screens just long enough for the advertiser to get his message across. This documentary film looks at a cottage industry-at the homes and owners who supply and train animal celebrities for gala openings, for fetes, television and films. The army of furry friends include Red Rum, who earns more for his owners in retirement than he ever earned as a steeplechaser, Bee, a singing otter, tigers, tea-drinking chimps and pussies galore. Even in death famous animals live on in the caring hands of the taxidermist.
Film cameraman KEVIN ROWLEY Film recordists
BOB ROBERTS , RICHARD KING Film editor ALAN LYGO
Executive producer ROGER MILLS Producer JUDI CONNER

The Embassy
World Professional Snooker Championship
Further coverage

11.30 Weatherview

The Embassy
World Professional Snooker Championship
Late night coverage of this evening's matches and results
Introduced by DAVID VINE

Weekend Outlook helps you plan your weekend by previewing daytime programmes of special interest from the Open University on Saturday and Sunday.

12.15 Education: Old Dog, New Trick
Daughter's handy with the home computer; Dad isn't: Mum knows why. A light-hearted excursion into the nature of learning.

12.40 The Madonna di San Biagio
The church of the Madonna of San Biagio is an -'ideal' church. What was the 'ideal' which Renaissance architects strove to achieve?

(to 1.10)