There is much that is unsaid or downright odd about Danger At Ocean Deep. Firstly, it has nothing to do with the Cliff Richard song, Ocean Deep, from 1983. That much is clear. Secondly, nothing actually takes place deep in the ocean as the title suggests. Thirdly, and probably most importantly, most of the plot is held together by the thinnest of threads that don’t make any sense. The thing is though, the story carries on with such conviction that you may struggle to notice what it is about the episode that doesn’t make any sense. My mind was somewhat blown when I sat down to watch this one again and I realised that I had been fooled for all these years into thinking this was a pretty solid episode with some interesting features. Maybe it still is, so let’s dive in…