John Lasell (November 6, 1928 - ) portrayed Dr. Peter Guthrie, a parapsychologist, in February and March 1967.
Appearances 
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160, 161, 162, 163, 164, 165, 167, 168, 169, 170, 171, 172, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186
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