It's been about 14 years since i have seen the last 2 seasons of Different strokes and i can't remember if arnold and lisa became a couple which is why i'm trying to buy different strokes episodes from the last two seasons. Can someone help me.

I dont think they became a couple, but they hooked up in the dark room.

Yeah I think their feelings for each other only lasted for about a half an episode. By the end of the episode where they were locked up together, I believe they went back to disliking each other. But they never did date or anything like that in the shows run.