Limit the amount of episodes of the same show that go one after the other in a playlist, so you can put the limit in 2, so you cannot see 3 episodes of The Simpsons one over the other, and instead of that, 2 episodes of Futurama plays, and then, it can allow to play 2 more episodes of The Simpsons.
This form, the user can vary and see more shows in the playlist, and not just random, so if a show has a lot of episodes is probable to have 10 episodes one over the other together and it gets a bit more tedious than what I suggested.