Raised from boyhood by non-corporeal beings, 17 year old Charles Evans is picked up and transferred to the Enterprise. On board the ship, the teenager proves dangerously unable to wield his enormous psionic powers with maturity.

In a freak accident the Enterprise is sent back to 20th century Earth, and must find their way back without changing history.

The Enterprise crew try to rescue colonists from deadly radiation, but instead encounter strange alien spores that seem to offer paradise.

Kirk and Spock must travel into the past in order to correct a change that will alter history.

Two powerful aliens threaten the well-being of the Enterprise and her crew.

The Enterprise must transport dignitaries to a peace conference, with an assassin on the loose.

The crew of the Enterprise become entangled in a planet's tribal power struggle.

Beings from another galaxy commandeer the Enterprise in an attempt to return home.

A skeleton Enterprise crew are assigned to test a revolutionary computer system that is given total control of the ship.

The crew of the Enterprise are on a secret mission to steal a Romulan cloaking device.

Kirk, McCoy, and Sulu are stranded on a barren planet where a mysterious woman attempts to kill them one at a time, while the Enterprise must travel halfway across the galaxy to rescue them.

The Enterprise picks up a group of space "hippies" looking for Eden.