I had an excellent time with the Sea Devils. While the story is a standard affair considering this era, I'm most impressed by the amount of resources the crew put into filming around water, and a pretty cool set for the Master's prison. The Sea Devils themselves look just okay but I think compare well to something like The Silurians. Overall, I had a good time. The Master, Jo, and the Doctor are all a lot of fun here - everyone has good chemistry with each other and it is just easy to let Pertwee's charm just carry you through the story. Most of the guest actors are quite solid, too. Just when I think the premise started wearing thin, the story is brought to an end, and I'm left with a pretty fond feeling towards this story overall.