2-06: The Doomsday Machine
Dispatched to investigate the destruction of several planets, the Enterprise encounters the badly damaged U.S.S. Constellation.
2-24: The Ultimate Computer
The Enterprise's test of Dr. Daystrom's greatly enhanced computer becomes deadly.
2-22: By Any Other Name
The Enterprise is commandeered by members of the Kelvan empire, seeking to return to the Andromeda galaxy.