While hardcore fans will no doubt demand that Captain Kirk gets a mention (he’s James T Kirk after all) we’re actually going to give fourth place to the menacing parallel Spock who appears in Season 2’s ‘Mirror, Mirror’.
Sporting natty eyeliner, one hell of a goatee and the deadly Agonizer (a device used to deal out pain), the mistrustful Vulcan cuts a striking figure and is a world apart from the Spock we all know and love. The parallel universe proved so popular it also appeared in episodes of Enterprise and Deep Space Nine.