Captain Kirk is infected with the Psi 2000 virus

Captain James T. Kirk found his first officer, Lieutenant Commander Spock, in the briefing room of the USS Enterprise NCC-1701 in an anguished reflection. Spock told Captain Kirk that he never told his mother, Amanda Grayson, that he loved her. Kirk slapped Spock and told him to snap out of it and get the job done. Spock admitted his shame for feeling friendship with the Captain. Struck again, Spock became very angry and hit Kirk back, sending him flying over the briefing room table, infecting him with the Psi 2000 virus.