According to George Takei, Tuvok actor Tim Russ made some changes to the script, immediately eliciting the writers to correct some discrepancies. (The Official Star Trek: Voyager Magazine, issue #9) Takei explained, “He made script changes that made Tuvok’s behavior consistent with Vulcan culture where the writers had been derelict. For example, the script suggested that Tuvok had had an affair with a non-Vulcan before his pon farr. He made sure that was corrected.” (Star Trek Monthly issue 22) Additionally, Russ inadvertently drove Brannon Braga to include more about Tuvok’s backstory in the episode than had originally been scripted, being particularly instrumental in the writing of what Tuvok says to Janeway while in his bunk aboard the Excelsior. “Initially that whole speech wasn’t in there, a page and a half of dialogue,” Russ revealed. “She asked me, ‘What made you come back to Starfleet?’ and [Braga] had written some line which really wasn’t consistent with Vulcan character. I said, ‘Brannon, the line itself doesn’t work.’ So I said, ‘Give him a real reason why he came back to Starfleet.’ I expected a paragraph, and I ended up getting a page and a half of dialogue. Things like that do make a difference.”
I suspect that were I an actor (I am not), I’d be a pain in the sorrybarb to the writers like Tim Russ