Kurn

Kurn, played by Tony Todd, is Worf's brother in Star Trek: The Next Generation and Star Trek: Deep Space Nine. Kurn is introduced in the episode "Sins of the Father", where, as part of an officer exchange program, he is posted to the Enterprise (in exchange for Riker's earlier placement on a Klingon ship, depicted in "A Matter of Honor"). Kurn specifically requested the Enterprise, and was assigned on a temporary basis as a first officer. Kurn did this so that he could observe Worf closely. Eventually, he revealed that he was Worf's younger brother. He told Worf it was decided that he did not need to go to Khitomer. Worf had always thought that his entire family had died there. The Starfleet officer who rescued Worf had been told...