Assume that TAS has not been created yet. This pitching would be during the run of TOS (or longer, imagining it ran for more seasons)
Edit:
"FINNEGAN, BEGIN AGAIN" - While taking a much-needed shore leave, Kirk is rendered unconscious and wakes up in a room with his old nemesis, Finnegan. Finnegan believes Kirk has kidnapped him and demands to know why. Kirk, for his part, is confused, but less suspicious of his old "enemy", and tries to convince Finnegan that he is not responsible, and if they work together, they can escape their prison and go home. Can Kirk convince Finnegan to accept a truce, let bygones be bygones, determine who's really responsible for their abductions, and escape? (The perpetrator is an alien fascinated with human rivalries, alpha male struggles, etc) Meanwhile, the crew of Enterprise is under fire from a mysterious alien weapon that throws their own systems into chaos (climate control, lights, doors opening and closing - think a hack attack, if the 60s had that)
Next episode: "The Wretched Thirdling"