Episodes
Season 1
6
Season 2
13
Season 3
12
Season 4
24
Season 5
15
Season 6
40
Season 7
40
Season 8
45
Season 9
56
Season 10
71
Season 11
72
Season 12
61
Season 13
50
Season 14
43
Season 15
39
Season 16
24
Season 17
12
Season 18
14
Season 19
8
Season 20
3
Season 21
14
Season 22
11
Discussion
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Narrator
Lloyd Sherr289 votes1 -
Himself - Directo...
William Atwater92 votes2 -
Narrator
Harlan Saperstein42 votes3 -
Narrator
Will Lyman19 votes -
Himself - Author,...
Vince Staten10 votes -
Narrator
Jack Perkins6 votes -
Carbon-Based Life...
Alexander B. Rubinow5 votes -
Himself - Aviatio...
Richard P. Hallion2 votes -
Herself - Monell ...
Pam Dalton0 vote
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