By 2273, Krase had rose to the rank of captain and was commanding officer of the IKS Amar. In 2273, the Amar was part of a squadron that detected V'Ger moving through Klingon space. The three ships moved to intercept the intruder. Upon meeting the intruder, Krase ordered a tactical scan of the cloud around V'Ger. Upon seeing the tactical report, Krase ordered the Amar to fire three photon torpedoes into the intruder.
V'Ger responded to the Klingon force by firing one of its plasma energy devices at one of the ships in the squadron. Krase and the others on board the Amar watched as the ship was vaporized. Seeing another plasma device heading for them, Krase ordered his gunners to fire a torpedo at it, but the torpedo was absorbed by the device. Krase and the Amar crew were killed when the plasma device hit and vaporized the Amar. (TOS movie, novelization & comic adaptation: Star Trek: The Motion Picture; Star Trek CCG: The Trouble with Tribbles)
- Like Keras, the name Krase comes from the Star Trek CCG expansion The Trouble with Tribbles, and is an anagram of Sarek, as both characters were portrayed by Mark Lenard.
- In a previous version of the film's script, the Amar captain was named Barak. Author Christopher L. Bennett, in his novel Forgotten History, calls him Barak, son of Krase.