The end of season 4 episode 9 (Desperate Dive) is missing. The programme stops part-way through an interview that seems pretty close to the end of the programme, but not actually at the end.
I also noticed that the "watch next episode/watch something else" prompt comes up about 10 minutes from the end - i.e. way too early.
If anyone is wondering what they're missing from the story: looking at Wikipedia, pretty much all the investigator's conclusions are covered before the episode cuts off.