Recently I have been you tubing/ reading some of the horror stories of Shatner being a jerk (allegedly maybe, maybe not) to his cast mates from stealing lines and camera time to killing a tv guide photo shoot of Nimoy's make up.
Most of those stories are unsubstantiated bullshit from bitter day players (ex. Takei, Nichols, et al) thinking that post series convention support meant they were always on the same level of importance to the series. They had their place, but it was not as an equal to Shatner.
So if he was such a problem could GR have fired him and either replace Shatner with another actor (ala Be Withched, or The In-Laws) or put a new captain in place (B5 comes to mind) or promoted Spock full captain?
No. Shatner was the lynch pin that gave the series a charismatic, unique heart never found in his predecessor, Jeffrey Hunter, and stands apart from other leading men from TV of that decade.
The Hunter matter can be applied to other actors, but i'll start with him; some love fantasizing that he would have been as effective in the role of captain (as if the character is the same--they were not), but its just too easy to dismiss.
From the start, Shatner's range and investing some of his own personality / world perspective created something
Star Trek could not survive without--and allowed Nimoy to create the Spock we all know. This was no plug-in Dick York / Dick Sargent issue. They were dropped in a very broad, cookie-cutter "befuddled / irascible husband" mold that was not the driving, defining force of
Bewitched. They merely reacted to Samantha and Endora's poles of witch behavior. Unlike the plug-in Darrins, Shatner's contribution to the success and the
identity of
Star Trek is almost inestimable.
Kirk as written--had something only Shatner posessed, and Hunter did not--heart. That heart prevented both character & actor from behaving like a cold, distant person who was just
occupying the job--or acting like it was a forced burden.
Shatner not only delivered with the many emotional changes demanded of WNMHGB, but was able to build on that with his personality in stories so removed from Hunter and other actors' known skills as a character early on (think
"The Enemy Within," "Miri," "Dagger of the Mind," "What Are Little Girls Made Of," etc.).
As mentioned in another thread, all actors cannot portray all characters, or are right to carry a series. For example, Lyle Waggoner screen tested for Dozier's 1966
Batman, but lost to Adam West. In the Waggoner screen test, he's flat, and delivering it sans any attempt to bring so colorful a character to life. On the other hand, West--in and out of costume, keyed in on Batman having a greater heroic purpose without even doing anything visually heroic. He just worked, and its no surprise he won the role, and would go on to easily justify why he was the right choice for the series.
Trying to replace West in that series would have been a disaster. I see the same if you tried to replace Shatner with Robert Vaughn (
The Man from U.N.C.L.E), David Hedison (
Voyage to the Bottom of the Sea), Efrem Zimbalist, Jr. (
77 Sunset Strip, &
The F.B.I.), Robert Fuller (
Laramie), Gene Barry (
Burke's Law), Guy Williams (
Lost in Space), Robert Culp (
I Spy) Robert Conrad (
Hawaiian Eye &
The Wild, Wild West) or any of another dozen or so leading men from that decade. There was only one Kirk and only one man who could bring character and flesh to him.