The main actors in each of the Star Trek series are:
TOG - William Shatner, Leonard Nimoy TNG - Patrick Stewart, Jonathan Frakes, Brent Spiner DS9 - Avery Brooks Voyager - Kate Mulgrew Enterprise - Scott Bakula.
TOS:
William Shatner as Capt. James T. Kirk
Leonard Nimoy as Mr. Spock
DeForest Kelly as Dr. Leonard "Bones" McCoy
James Doohan as Lt Cmdr. Montgomery Scott
George Takei as Lt. Hikaru Sulu
Nichelle Nichols as Lt. Nyota Uhuara
Walter Koenig as Ensign Pavel Chekov
The Next Generation:
Patrick Stewart as Capt. Jean-luc Picard
Jonathan Frakes as Cmdr. William T. Riker
Gates McFadden as Dr. Beverly Crusher
Brent Spiner As Lt Cmdr. Data
Micheal Dorn as Lt. Worf
Marina Sirtus as counselor Deanna Troi
Levar Burton as Lt Cmdr. Gordi LaForge
Wil Weaton as Ensign Wesely Crusher
DS9
Avery Brooks as Capt. Benjamin L. Sisko
Rene Aubrjonois as Odo
Alexander Siddig as Dr. Julian Bashir
Nanna Visitor as Major Kira Nyrese
Ciroc Lofton as Jake Sisko
Terry Farrell as Lt. Jadzia Dax
Nicole de Boer as Ensign Ezri Dax
Armin Shimermen as Quark
Micheal Dorn as Lt Cmdr. Worf
Voyager
Kate Mulgrew as Capt. Katherine Janeway
Robert Beltran as Cmdr. Chakotay
Robert Picardo as The Doctor
Eathan Phillips as Neelix
Jennifer Lien as Kes
Tim Russ as Lt. Tuvok
Robert Duncan Mcneil as Lt. Tom Paris
Roxanne Dawson as Lt. Bellana Torres
Jeri Ryan as Seven of Nine tertiary adjunct of uni-matrix 01
Garrett Wang as Ensign Harry Kim
Enterprise
Scott Bakula as Capt. Jonathan Archer
Jolene Blalock as Cmdr. T'pol
John Billingsly as Dr. Phlox
Dominic Keating as Lt. Malcolm Reed
Anthony Montgomery as Ensign Travis Mayweather
Linda Park as Ensign Hoshi Sato
Conner Trinneer as Lt Cmdr Charles Tucker III
Star Trek (2009 film)
Christopher Pine as Capt. James T. Kirk
Zachary Quinto as Mr. Spock
Karl Urban as Dr. Leonard "Bones" McCoy
Zoe Saldana as Lt. Nyota Uhuara
Simon Pegg as Lt. Cmdr Montgomery Scott
John Cho as Lt. Hikaru Sulu
Anton Yelchin as Ensign Pavel Chekov
Leonard Nimoy as Spock Prime
Eric Bana as Nero
Star Trek cast members are William Shatner who was Captain Kirk, Leonard Nimoy who was Commander Spock, DeForest Kelly who was Leonard "Bones" McCoy, James Doohan who was Scotty, Nichelle Nichols who was Lt. Nyota Uhura, George Takei who was Hikaru Sulu, Walter Koenig who was Chekov, Majel Barrett who was Nurse Chapel, Grace Whitney who was Janice Rand, Robin Curtis who is Savik, Mark Lenard as Sarek, Jane Wyatt who plays Amanda Grayson and cat members in the reboot version include Chris Pine as James Kirk, John Cho who plays Hikarui, Simon Pegg who plays Montgomery Scott, Zach Quinto who is Spock, Zoe Saldana who is Nyota Uhura, Kalr urban who is Leonard McCoy, Anton Yelchin who is Paul Chekov and Bruce Greenwood who is Christopher Pike.
There are various Kirks..
But the main Captain Kirk actor was William Shatner.
William Shatner
William Shatner
William Shatner
William Shatner was James T. Kirk (captain and later admiral) in the Star Trek original series and in the first 6 movies.Chris Pine plays James T. Kirk in a different timeline than the original Star Trek universe, as re-imagined in the 2009 movie and its sequels.
William Shatner played the original. or James Tiberius kirk
Chronologically, Captain Jonathan Archer was the captain of the first starship Enterprise in the prequel series Enterprise (2001-2005) However, Captain James T. Kirk was the first captain to appear in the franchise, on the original series (TOS) from 1966-1969. An earlier captain of the Enterprise NCC-1701 was Captain Christopher Pike, who appeared in the first Star Trek pilot filmed in 1964. Star Trek pilot (added to TOS as "The Cage") - Christopher Pike (Jeffrey Hunter) Star Trek the original series - James T. Kirk (William Shatner) Star Trek / Enterprise - Jonathan Archer (Scott Bakula)
James Cagney
Captain James Kirk was (will be?) the commander of the starship USS Enterprise in the TV series Star Trek, and in four of the Star Trek movies. He is played by the actor William Shatner.
Captain James T. Kirk, played by William Shatner
James T. Kirk
James T. Kirk
William Shatner was James T. Kirk (captain and later admiral) in the Star Trek original series and in the first 6 movies.Chris Pine plays James T. Kirk in a different timeline than the original Star Trek universe, as re-imagined in the 2009 movie and its sequels.
The primary character in the original series was the Captain of the ship. This allowed them to show the challenges of command. That held true with some of the newer series's. It was played by William Shatner, and it was James T. Kirk that was the focus.
William Shatner played the original. or James Tiberius kirk
In the Original Series, the CO (commanding officer) is the captain of the ship, Captain James T. Kirk. However, Spock is of the rank commander, if that's what you were asking.
Star Trek TOS (the original series) : James T. KirkStar Trek TNG (The Next Generation) : Jean-Luc PicardStar Trek VOY (Voyager, not Enterprise) : Kathryn JanewayStar Trek ENT (series Enterprise) : Jonathan Archer---Star Trek captains on all 5 live-action TV series :James T Kirk - Star Trek (the original series 1966-1969)Jean-Luc Picard - Star Trek: The Next Generation (1987-1994)Benjamin Sisko - Star Trek: Deep Space 9 (1993-1999)Kathryn Janeway - Star Trek: Voyager (1995-2001)Jonathan Archer - Star Trek: Enterprise (nee Enterprise 2001-2005)
Robert April never appeared in the Original Series, he appear in one episode of the Animated Series "The Counter-Clock Incident" and was voiced by James Doohan
Chronologically, Captain Jonathan Archer was the captain of the first starship Enterprise in the prequel series Enterprise (2001-2005) However, Captain James T. Kirk was the first captain to appear in the franchise, on the original series (TOS) from 1966-1969. An earlier captain of the Enterprise NCC-1701 was Captain Christopher Pike, who appeared in the first Star Trek pilot filmed in 1964. Star Trek pilot (added to TOS as "The Cage") - Christopher Pike (Jeffrey Hunter) Star Trek the original series - James T. Kirk (William Shatner) Star Trek / Enterprise - Jonathan Archer (Scott Bakula)
The captain of the starship Enterpize was James T Kirk. Many people can get confused to know if its James T Kirk or Alan Shepard because Alan was the first US astronaut but the captain was definitely James T Kirk.
Christopher Pike, whose appearance in the original footage was threaded into the series pilot re-write featuring James T. Kirk.