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Hartley knows that birds fly in the sky. He also knows that they sit in the trees and run about in the grass. But when he sets out to do some birdwatching they all vanish...
First Air Date : Jan 01, 1973
Last Air date : Dec 29, 1981
Episode : 321 Episode
Season : 14 Season
Runtime: 15:14 minutes
Studio: ITV1
Country: United Kingdom
Crew: Gail Renard (Writer)
