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UFO: S1 E23
The Sound of Silence
A UFO hides in a lake on a country estate of a well-known equestrian, and the equestrian himself vanishes. When SHADO tracks down the UFO and manages to destroy it in an exchange of pot-shots, the UFO breaks up and leaves a thing floating in the water. Treated as if it is a bomb, it is brought back to SHADO and examined, with unexpected results.
S1 - E1Identified Sep. 16, 1970
S1 - E2Exposed Sep. 23, 1970
S1 - E3The Cat With Ten Lives Sep. 30, 1970
S1 - E4Conflict Oct. 07, 1970
S1 - E5A Question of Priorities Oct. 14, 1970
S1 - E6E.S.P. Oct. 21, 1970
S1 - E7Kill Straker! Nov. 04, 1970
S1 - E8Sub-Smash Nov. 11, 1970
S1 - E9Destruction Dec. 02, 1970
S1 - E10The Square Triangle Dec. 09, 1970
S1 - E11Close Up Dec. 16, 1970
S1 - E12The Psychobombs Dec. 30, 1970
S1 - E13Survival Jan. 06, 1971
S1 - E14Mindbender Jan. 13, 1971
S1 - E15Flight Path Jan. 20, 1971
S1 - E16The Man Who Came Back Feb. 03, 1971
S1 - E17The Dalotek Affair Feb. 10, 1971
S1 - E18Timelash Feb. 17, 1971
S1 - E19Ordeal Apr. 14, 1971
S1 - E20Court Martial May. 01, 1971
S1 - E21Computer Affair May. 15, 1971
S1 - E22Confetti Check A-O.K. Jul. 10, 1971
S1 - E23The Sound of Silence Jul. 17, 1971
S1 - E24Reflections in the Water Jul. 24, 1971
S1 - E25The Responsibility Seat Mar. 08, 1973
S1 - E26The Long Sleep Mar. 15, 1973