Stargate Atlantis
Season 3, Episode 12: Echoes
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The inhabitants of Atlantis begin to suffer ill effects when the planet's whale population begins migrating to the island city, bringing an unexpected harbinger of doom.
All Episodes - Season 3
Episode 1
No Man's Land (2)
Episode 2
Misbegotten (3)
Episode 3
Irresistible
Episode 4
Sateda
Episode 5
Progeny
Episode 6
The Real World
Episode 7
Common Ground
Episode 8
McKay and Mrs. Miller
Episode 9
Phantoms
Episode 10
The Return (1)
Episode 11
The Return (2)
Episode 12
Echoes
Episode 13
Irresponsible
Episode 14
Tao of Rodney
Episode 15
The Game
Episode 16
The Ark
Episode 17
Sunday
Episode 18
Submersion
Episode 19
Vengeance
Episode 20
First Strike (1)