Season 1

April 17, 1977 | 24 Episodes

Leonard Nimoy hosts investigations into various mysteries.

Season 2

December 24, 1977 | 24 Episodes

Leonard Nimoy hosts investigations into various mysteries.

Season 3

September 14, 1978 | 24 Episodes

Leonard Nimoy hosts investigations into various mysteries.

Season 4

September 20, 1979 | 24 Episodes

Leonard Nimoy hosts investigations into various mysteries.

Season 5

September 20, 1980 | 24 Episodes

Leonard Nimoy hosts investigations into various mysteries.

Season 6

September 21, 1981 | 24 Episodes

Leonard Nimoy hosts investigations into various mysteries.

Season 7

October 4, 2002 | 8 Episodes

Leonard Nimoy hosts investigations into various mysteries.