Star Trek: The Original Series

Star Trek: The Original Series (originally simply titled Star Trek) first aired in 1966. Set in the twenty-third century (the year 2265), it focuses on the cowboy-like adventures of Captain Kirk, the crew of the first Enterprise, and their five-year space mission. The series only lasted three years before being cancelled, but gained popularity during subsequent re-runs, and eventually, six movies were made.

Captain James T. Kirk
James T. Kirk (William Shatner)

Spock
Spock (Leonard Nimoy)

Doctor Leonard "Bones" McCoy
Leonard "Bones" McCoy (DeForest Kelley)

Scotty
Montgomery Scott ("Scotty") (James Doohan)

Lieutenant Uhura
Uhura (Nichelle Nichols)

Lieutenant Sulu
Hikaru Sulu (George Takei)

Ensign Chekov
Pavel Chekov (Walter Koenig)

Nurse Christine Chapel
Christine Chapel (Majel Barrett)

Yeoman Janice Rand
Janice Rand (Grace Lee Whitney)

The Animated Series
Star Trek: The Animated Series was launched in 1973, following the cancellation of the Original Series. It features all the major characters of the first show, and the voices of the original actors. This series lasted two years before being cancelled and is not always considered a proper part of Star Trek canon.

The 2009 Reboot
In 2009, in an attempt to "reboot" the Trek franchise (which had produced no new material since the cancellation of Enterprise in 2005), an eleventh feature film (generally known as Star Trek: 2009 or Star Trek: Reboot) was made with new actors playing the roles of the Original Series characters, set in the year 2255, when most of them were attending Starfleet Academy. It was a great success, and because the plot revolves around a time-travel incident that created an alternate universe in 2233, it allows for sequels, one of which is already in pre-production.

James T. Kirk
James T. Kirk (Chris Pine)

Spock
Spock (Zachary Quinto)

Leonard "Bones" McCoy
Leonard "Bones" McCoy (Karl Urban)

Nyota Uhura
Nyota Uhura (Zoë Saldana)

Hikaru Sulu
Hikaru Sulu (John Cho)

Pavel Chekov
Pavel Chekov (Anton Yelchin)

Scotty
Montgomery Scott ("Scotty") (Simon Pegg)

Captain Christopher Pike
Christopher Pike (Bruce Greenwood)

Spock Prime
Spock Prime (Leonard Nimoy)

Nero
Nero (Eric Bana)

Sarek
Sarek (Ben Cross)

Amanda Grayson
Amanda Grayson (Winona Ryder)

George and Winona Kirk
George Kirk and Winona Kirk

Gaila
Gaila

Star Trek: TOS and the PPC
PPC agents should note that it is this series which is responsible for the Redshirt Effect, as it was very common for nameless security officers (who wore red uniforms in this era) to accompany Kirk and other lead characters on the away mission of the week, and promptly die to illustrate how dangerous the situation was.