Slow loading and tv episode stops playing

TV episode initially wouldn't load onto smart TV. Tried to load again and got error message, "episode unavailable at this time." Episode finally loaded, played for 30 seconds then stopped playing and started re-loading. Episode once again started to play and then stopped again to re-load. Never had problems like this before and bought a new router a few months ago. Streaming worked fine yesterday on TV and later on the iPad. Had the same streaming problems over the weekend.