Kirk and his crew are at deadly risk from an alien creature that feeds on the salt in a human body and can take on any form. Air Date : 8th-Sep-1966  Read More

Charlie Evans, the sole survivor of a transport crash, is transferred to the Enterprise from a different ship. Why are they so eager to rid themselves of him, though? There's more to Charlie than meets the eye... Air Date : 15th-Sep-1966  Read More

While exploring the edge of the galaxy, the Enterprise encounters an energy barrier that gives some crewmen strange powers. Air Date : 22nd-Sep-1966  Read More

A strange alien substance causes the crew to lose their inhibitions. Air Date : 29th-Sep-1966  Read More

A transporter malfunction causes Captain Kirk to split into his "good" and "evil" selves, and a landing party will freeze to death if they don't merge the two back together. Air Date : 6th-Oct-1966  Read More

The Enterprise picks up a intergalactic conman, Harry Mudd, and three incredibly beautiful women who harbor a dark secret. Air Date : 13th-Oct-1966  Read More

Nurse Christine Chapel is reunited with her old fiance on Exo III, but the scientist has plans for Captain Kirk and the Federation. Air Date : 20th-Oct-1966  Read More

Kirk and a landing party are stranded on a planet due to a disease that causes any adult to die a painful death, and must deal with the local children who have survived. Air Date : 27th-Oct-1966  Read More

Kirk investigates an experimental facility for holding prisoners and finds a sinister scheme. Air Date : 3rd-Nov-1966  Read More

The Enterprise encounters a vast alien ship that threatens the Enterprise with destruction. Air Date : 10th-Nov-1966  Read More

Spock kidnaps his former captain, the crippled Christopher Pike, and heads for a quarantined planet, putting his career and Kirk's life on the line. Air Date : 17th-Nov-1966  Read More

Spock's court-martial continues as he attempts to justify his abduction of Pike, the theft of the Enterprise, and his heading for a planet declared forbidden by Starfleet. Air Date : 24th-Nov-1966  Read More

Kirk is one of the last survivors who can identify a mass killer, who lurks among a Shakespearean troupe aboard the Enterprise. Air Date : 8th-Dec-1966  Read More

Kirk pits the Enterprise against an invisible spaceship testing the Federation's defenses. Air Date : 15th-Dec-1966  Read More

The Enterprise crew take shore leave on a peaceful, pastoral planet... where their dreams and fantasies come to life. Air Date : 29th-Dec-1966  Read More

Spock commands a stranded away team when their shuttlecraft is stranded on a planet with hostile natives. Air Date : 5th-Jan-1967  Read More

The Enterprise finds itself at the mercy of a seemingly omnipotent being who fancies himself an 18th century Englishman. Air Date : 12th-Jan-1967  Read More

When a mysterious alien race destroy an Earth colony, the Enterprise pursues, but Kirk and the alien captain are forced to fight each other by powerful aliens. Air Date : 19th-Jan-1967  Read More

In a freak accident the Enterprise is sent back to 20th century Earth, and must find their way back without changing history. Air Date : 26th-Jan-1967  Read More

Captain Kirk's career is at stake when he is put on trial for the loss of a crewman during an ion storm. Air Date : 2nd-Feb-1967  Read More

The Enterprise encounters a seemingly peaceful civilization run by a "benevolent" being named Landru... who intends for them to join his people. Air Date : 9th-Feb-1967  Read More

The Enterprise picks up a crew of genetic supermen from the 20th century... and their leader, Khan, plans to create a new empire. Air Date : 16th-Feb-1967  Read More

The Enterprise arrives at a planet to establish diplomatic relations and finds itself in the middle of a "peaceful" war that threatens to destroy the ship. Air Date : 23rd-Feb-1967  Read More

The Enterprise crew try to rescue colonists from deadly radiation, but instead encounter strange alien spores that seem to offer paradise. Air Date : 2nd-Mar-1967  Read More

Kirk investigates a series of grisly murders on a mining planet that are the work of a seemingly hostile alien creature. Air Date : 9th-Mar-1967  Read More

The Federation and the Klingon Empire teeter on the brink of war as Kirk investigates Organia, a humble planet, inhabited by pacifists, that is unwittingly caught in the middle. Air Date : 23rd-Mar-1967  Read More

Kirk and Spock encounter an alien named Lazarus who claims to be from an anti-matter universe. Air Date : 30th-Mar-1967  Read More

Kirk and Spock must travel into the past in order to correct a change that will alter history. Air Date : 6th-Apr-1967  Read More

Kirk and the Enterprise must combat parasitic aliens threatening the lives of millions. Air Date : 13th-Apr-1967  Read More