2-17: A Piece of the Action

The Enterprise's test of Dr. Daystrom's greatly enhanced computer becomes deadly.

Dispatched to investigate the destruction of several planets, the Enterprise encounters the badly damaged U.S.S. Constellation.

After traveling back to 1960s Earth, the Enterprise accidentally beams aboard a time-traveling secret agent.

The Enterprise is commandeered by members of the Kelvan empire, seeking to return to the Andromeda galaxy.

Several crew members are possessed by advanced non-corporeal beings.