Susan Howard played Mara, the science officer of Kang's battle cruiser and his wife, in Day of the Dove, the first Klingon woman to be seen in Star Trek.
Susan Howard (born 1944) is an American actress later known for the series Dallas. In the third-season episode Day of the Dove she plays Mara, who is both science officer and wife to the Klingon commander Kang.
Mara is among the survivors of Kang's ship brought aboard the Enterprise, where an energy being feeds on the hatred between the two crews. She is attacked by a maddened Chekov and rescued by Kirk, and this helps to persuade her that the humans are telling the truth about the entity.
She takes Kirk to Kang and urges her husband to listen, and the truce that follows drives the creature away. No female Klingon had appeared before her, and the character has since featured in several novels.