By the Pricking of My Thumbs...

The Doomwatch team investigates the myth about the XYY chromosome after a schoolboy is expelled for possessing it.

My Thoughts

Guest Stars

Special appearances in this episode.

Guest Stars

Vivien Sherrard

Barbara Mason

John Nolan

Geoff Hardcastle

Olaf Pooley

Dr. Ensor

Colin Jeavons

Botting

Jean Trend

Dr. Fay Chantry

Barry Stokes

Stephen Franklin

Sally Thomsett

Judy Franklin

Martin Howells

Gerald Jenkins

David Janson

Arnold McPherson

Robert Yetzes

Painton

David Jarrett

Tom Avery

Bernard Hepton

Oscar Franklin

Patsy Byrne

Mary Franklin

Patrick Milner

Airport Policeman

Julie May

Shopper

Paula Smith

Ground Hostess

Crew

Episode-specific crew credits.

Robin Chapman

Writer

Writing

Eric Hills

Director

Directing

Christopher Rowlands

Editor

Editing

Videos

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Videos

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Stills

Episode still images from TMDB.

Stills

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