Tark was an Argelian musician from Argelius II and the father of the female dancer Kara.
Both had had a show together since Kara had been a little girl, when Kara was brutally murdered in 2267 by the Redjac entity. Tark was saddened about her death, but was also furious about his would-be son-in-law Morla, because he had been jealous of Kara, an emotion which Tark viewed as disgraceful. Tark participated in the investigation of the murders until the true murderer, the Redjac entity disguised as Hengist, was discovered. (TOS: "Wolf in the Fold")
Tark was played by actor Joseph Bernard.