Ceti Alpha Five

Ceti Alpha Five is the planet where Khan Noonian Singh and his followers were deposited by James T. Kirk after they tried to take over the USS Enterprise. Mike Harper and the SS Clydesdale went there to check on Khan and his followers. Subsequent events resulted in the destruction of Ceti Alpha Six, which did not do wonders for Ceti Alpha Five's already harsh climate. ("The Khan Job" [TOS])