Gunsmoke. I've always sworn that the half hour episodes were always the best. Minus two episodes, one because the streaming service got them messed up and the other I fell asleep during, I've watched the first five seasons. I'm starting season 6 this morning.
Streaming on Pluto TV, the picture quality. It's great. Sometimes it's a little grainy, but it's film being upscaled to 2K or 4K. The graininess is more noticeable in the studio shots, the outdoor ones are fine.
Although there's a few commercials featured in two different breaks, I find that the Pluto on demand is actually a better quality than watching it on one of their channels.