Star Trek
S03E08 For the World Is Hollow and I Have Touched the Sky
The Enterprise crew scrambles to prevent an asteroid from crashing into a Federation planet, only to uncover that the asteroid is, in fact, an inhabited generation ship.
Season 3 Episodes
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Spock's Brain
The Enterprise Incident
The Paradise Syndrome
And the Children Shall Lead
Is There in Truth No Beauty?
Spectre of the Gun
Day of the Dove
For the World Is Hollow and I Have Touched the Sky
The Tholian Web
Plato's Stepchildren
Wink of an Eye
The Empath
Elaan of Troyius
Whom Gods Destroy
Let That Be Your Last Battlefield
The Mark of Gideon
That Which Survives
The Lights of Zetar
Requiem for Methuselah
The Way to Eden
The Cloud Minders
The Savage Curtain
All Our Yesterdays
Turnabout Intruder