Tim Russ' Star Trek: Voyager character was always so consistently levelheaded that it was unusual to see him act in any other way than as a traditionally placid Vulcan, which made the scene where Tuvok killed a fellow member of his ship's crew especially harrowing. Tuvok's Star Trek timeline takes him through several challenges, and many of them don't cause him to lose his composure in any notable way. However, one episode pushed Tuvok to his absolute limit, and it still makes me uneasy to watch the installment's most shocking scene.