Star Trek: Phase II was a planned television series set to air in Spring 1978 on a proposed Paramount Television Service (which eventually became United Paramount Network) based on the characters of Gene Roddenberry's Star Trek. The planned series was to describe the adventures of the Enterprise crew on a second five-year mission after the completion of the first series.
The series was planned to have included William Shatner and DeForest Kelley reprising their roles as James T. Kirk and Leonard McCoy. Conspicuous by his absence was Leonard Nimoy, who declined to return due to a marketing issue over the Spock character and obligations to the play Equus.
The series would have included several new characters, such as Commander William Decker, Lieutenant Ilia, and the Vulcan Lieutenant Xon.
Despite the completion of most of the sets, several television grade models (Including the Enterprise herself and many of the pilot episode's models), and twelve full scripts, plans for a series were cancelled in favor of a movie - Star Trek: The Motion Picture - in which all of the characters made an appearance (however briefly). Decker and Ilia appearred as major characters throughout the movie. Lieutenant Xon (now called Commander Sonak) appeared only for a few minutes and had a few lines of dialogue before being killed in a transporter accident — the actor who was to play Xon, David Gautreaux, made a cameo appearance in the same movie as Epsilon 9's Commander Branch.
At one early stage, Xon was given the name Savik. A variation of the name, Saavik, was later given to a female Vulcan in Star Trek II: The Wrath of Khan.
Two scripts for the series ("The Child", "Devil's Due") were rewritten for use in Star Trek: The Next Generation due to a writers' strike. Additionally, some of the new elements in the series were eventually adapted into TNG. Riker may be seen as a version of Decker; and Troi of Ilia.
Twelve episodes of Star Trek: Phase II were scripted:
- "Are Unheard Memories Sweet?" or "Home" by Worley Thorne: While searching for a missing starship, the Enterprise comes across a world in need of men.
- "Cassandra" by Theodore Sturgeon: The Enterprise mediates a dispute between two worlds over "The Monitor", while a clumsy ensign takes care of an infant alien.
- "The Child" by Jaron Summers and Jon Povil: A being of light impregnates Ilia to experience life as a Deltan. The Enterprise's hull begins to fail as they come across a strange nebula.
- "Deadlock" by David Ambrose: While searching for a missing starship, the Enterprise is recalled to a Starbase to engage in a very strange war game.
- "Devil's Due" by William Douglas Lansford: The Enterprise has a first contact with the planet Naterra just as a mythical creature, who was sold the planet in exchange for peace millennia earlier, appears.
- "Kitumba" by John Meredith Lucas: The Enterprise is sent to the Klingon homeworld to help Ksia, the underage Klingon leader, stop his regent from making war on the Federation.
- "Lord Bobby's Obsession": The Enterprise comes across a derelict Klingon Cruiser with one life form aboard - one Lord Bobby from Earth's 18th century.
- "Practice in Waking" by Richard Bach: The Enterprise comes across a sleeper ship where Decker, Scott and Sulu get trapped in a simulation of the 16th century witch burnings.
- "Savage Syndrome" by Margaret Armen and Alfred Harris: While investigating an ancient starship, the Enterprise is hit with a blinding light which brainwashes the crew reverting them to savages.
- "To Attain the All" by Norman Spinrad: The Enterprise gets caught in a solar system sized logic game where, if you win, you "attain the All," a huge repository of knowledge.
- "Tomorrow and the Stars" by Larry Alexander: During a Klingon attack, Kirk orders an emergency beamup and is transported to Pearl Harbor, Hawaii just before the Japanese attack.
Due to the decision by Paramount Pictures and Roddenberry that only live-action events seen on screen qualify as canon, plus the fact that major elements including two episodes were incorporated by other Trek series, nothing involving Phase Two is considered canon. This creates some complications since many sources suggest that a second five-year mission of exploration - intended to incorporate Phase Two - occurred after TMP. However, there has never been any on-screen reference to Kirk being assigned such a mission, so unless a future TV series or film says otherwise, such a mission can only be considered fanon speculation.
- "Star Trek: Phase II (http://www.memory-alpha.org/en/index.php/Star_Trek:_Phase_II)" article at Memory Alpha, a Star Trek wiki