6.40 Polymerisation

7.5 Microbiology

7.30 Evolution of an Ocean

A lively look at words and letters with DONALD UEE
BOB HOSKINS and MARTIN SHAW
NIGEL STOCK , NORMAN ROSSINGTON PATRICIA HAYES
Script BARRY TOOK
Adviser CATHERINE MOORHOUSE Director BARBARA DFRKOW
Producer DAVID HARGREAVES

Weather MICHAEL FISH

BOB LANCLEY , MARIAN FOSTER
DAVID SEYMOUR and DONNY MACLEOD The live and lively magazine, presenting the personalities and talking points of the day and including the film feature Focus with Tony Bilbow.
Editor TERRY DOBSON

Mr Dizzy and Mr Greedy

with Vicki Luke.

Story: The Fabulous Hat
Written and illustrated by JOAN HICKSON
Presenters Chloe Ashcroft, Chris Tranchell
Pianist JOHN BURROWS
Designer JO DAY
Written and directed by ALBERT BARBER
Produced by PETER WILTSHIRE
Series producer ANNE GOREY

Raffle Ruckus
The adventures of a cool bear and his way-out companions in a quite impossible zoo.

by BOB BLOCK
Ethel Meaker is suffering the after-effects of being a Cocker Spaniel. Her barking alarms the neighbours and leads to a row with her husband. The Ghostly Trio attempt to smooth things over -with the help of Catastrophe Kate.
Incidental music JONATHAN COHEN Designer RAYMOND CUSICK Producer JEREMY SWAN

with Lesley Judd, Simon Groom and Christopher Wenner
Expedition USA: Break One Nine! Are there any smokies in the area? Double Dutch? No - just the language of CB (Citizen Band) Radio in Texas. Simon discovers how this new form of radio communication has been a life saver. And in Houston - America's Space Age City - he takes his life in his hands on the "Greezed Lightnin" - an incredible roller-coaster ride that loops the loop!
Blue Peter Fifteenth Book, £1.35, from bookshops

with Kenneth Kendall Weatherman

The Nationwide team of FRANK BOUGH , Sue Lawley
JOHN STAPLETON and BOB WELLINGS provides you with background to the news of the day and presents some of the less serious features and stories that make up the scene Nationwide.
With contributions from BBC studios throughout the country. Also from far and near, the programme's team of reporters LUKE CASEY , BERNARD CLARK , KEVIN COS-GROVE, TONY FRANCIS , DIANE HAR -RON, JAMES HOGG , BILL KERR ELLIOTT, NICHOLAS WOOLLEY and MARTIN YOUNG.

Introduced by Dave Lee Travis LEGS & CO
TOP OF THE POPS ORCHESTRA
Musical director JOHNNY PEARSON Choreography FLICK COLBY Sound ANTHONY PHILPOT Producer STANLEY APPEL
Executive producer ROBIN NASH

by John Esmonde and Bob Larbey
Starring Richard Briers, Felicity Kendal and Penelope Keith
with Paul Eddington

Tom and Barbara may talk to the trees, but Margo answers back.
(Repeat)

with Magnus Magnusson
Tonight an American Attorney takes up the brief on behalf of Thomas Jefferson , one-time President of the USA, which is just one of the interesting specialised subjects in tonight's Mastermird heat. The contenders are:
CHRISTINE SHAW , teacher English history 1603-1660
MICHAEL DIXON , Post Office manager Life and works of Sergei Prokofiev JOHN GEORGE , Herald
The Papal Conclaves 1799-1878 ANDREW REISH , attorney Thomas Jefferson
Director PETER MASSEY Producer BILL WRIGHT

with Kenneth Kendall and the BBC's reporters and correspondents around the world Weather

is the name of the team - a special crime squad - ready to swing into action - any time, anywhere starring in The Skykiller
Ex-convict Billy Wilcox hi-jacks a passenger jet and while the hostages on board watch helplessly he conducts a ' trial ' of the man who was responsible for his conviction for murder.

Introduced by Brian Matthew
Highlights from the greatest ice spectacular in Europe featuring a glamorous chorus of international skaters and an impressive line-up of star soloists.
This brilliant production includes: the romance of the waltz, and ballet to music from Gounod's ' Faust ' slapstick comedy of buckets and mops and remarkable antics of skating chimpanzees old-fashioned charm and yuletide cheer of a Victorian Christmas.
Televised by arrangement with skee GOODHART for International Holiday on Ice Co
Lighting BILL JONES
Producer DON SAYER

explains the news and examines the issues from Britain and around the world that are still going to matter tomorrow.
Presented by DONALD MACCORMICK With the Robin Day interview Including News Headlines