Air date: 1958-10-16

The initial run of consecutive episodes from 1959-1965.

Air date: 1965-09-20

John Noakes joins.

Air date: 1966-09-19

Christopher Trace leaves.

Air date: 1967-09-25

Peter Purves joins.

Air date: 1968-09-23

Air date: 1969-09-15

Air date: 1969-09-15

Air date: 1971-09-13

Leslie Judd joins.

Air date: 1972-09-11

Valerie Singleton leaves.

Air date: 1973-09-10

Air date: 1974-09-09

Air date: 1975-09-08

Air date: 1976-09-13

Air date: 1977-09-12

Air date: 1978-09-11

Air date: 1979-09-10

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Air date: 1991-09-09

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Air date: 2018-01-04

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Air date: 2025-09-05