The Ice Warriors are a extraterrestrial race of silly, hissing reptilian humanoids that no one could understand and who walked very slowly through long stretches of draggy episodes of Doctor Who. They were originally created by Brian Hellyes in 1967.
Although the race originally appeared as alien monsters laying siege to numerous bases, subsequent appearances have depicted the Ice Warriors as a more neutral group and as Klingons (thanks Gatiss). They've only appeared on the show five times total but people seem to like them despite Cold War.
Also, they have hands like lego men.