Episodes
Season 1
13
Season 2
17
Season 3
20
Season 4
19
Season 5
21
Season 6
19
Season 7
20
Season 8
20
Season 9
18
Season 10
21
Season 11
20
Season 12
21
Season 13
20
Season 14
22
Season 15
22
Season 16
20
Season 17
20
Season 18
19
Season 19
20
Season 20
20
Season 21
20
Season 22
17
Season 23
20
Season 24
20
Season 25
20
Season 26
16
Season 27
21
Season 28
19
Season 29
15
Season 30
17
Season 31
18
Season 32
14
Season 33
17
Season 34
15
Season 35
18
Season 36
17
Season 37
17
Season 38
18
Season 39
16
Season 40
24
Season 41
23
Season 42
21
Season 43
20
Season 44
21
Season 45
17
Season 46
23
Season 47
16
Season 48
22
Season 49
19
Season 50
18
Season 51
11
Discussion
Favorite characters
See all-
Narrator
Jay O. Sanders291 votes1 -
Narrator
John Lithgow52 votes2 -
Narrator
Craig Sechler37 votes3 -
Host
David Pogue20 votes -
Narrator
Lance Lewman15 votes -
Host
Brian Greene14 votes -
Host
Neil deGrasse Tyson9 votes -
Narrator
David Attenborough9 votes -
Narrator
Zachary Quinto2 votes
Best commentator
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