- This article is about the 24th century Klingon officer Klag. For the 22nd century Klingon governor of the same name, see Klag.
Klag's father was captured by the Romulans in battle and was not allowed die an honorable death. He had later escaped and was living without honor on Qo'noS, where he awaited death. Klag was ashamed of his father, and had not talked to him since his return.
In 2365, Klag was suspicious of his new first officer, Commander William T. Riker, assigned to him as part of an Officer Exchange Program between the two governments. He challenged Riker's authority, so, following the Klingon way, Riker fought up. This gained him the respect of Klag, and later they became friendly, talking with each other in the mess hall. When Captain Kargan blamed the USS Enterprise-D for planting subatomic bacteria that were eating away at the hull, Klag stood up for Riker. He said that Riker "may be a spy, but he is no coward." After Riker had taken control of the Pagh, Klag followed his orders, and when Kargan returned, Riker allowed Kargan to strike him (discipline him, Klingon fashion) in order that Kargan might regain the respect of the crew. As Klag helped him up, he commented that Riker understood Klingons better than he thought. (TNG: "A Matter Of Honor")