I thought DEATH IN DEEP WATER was not only one of the very best but contained some of the best acting and most strikingly memorable images. Suzan Farmer's character, invariably dressed in a tight blue bikini, is both physically and intellectually attractive. She's no teenage bimbo draped across the scenery to be sacrificed once enough has been seen of her heaving bosom. She's a mature, scheming, beguiling, strong minded and very pretty temptress with a plan. And what a plan! The twist in the tale is very clever and well worth waiting for.
Bradford Dillman as the underworld hit-man in hiding is suitably frustrated and bored by his situation and one can see the whole scenario falling nicely into place. There is a bit of chemistry going on between the actors here and as a team they work together well.The acting is excellent.Ian Bannen seems a little out of place and his character is a cliché but everyone else is well cast.
The seaside locations in Devon are delightful & very well chosen while the set designs are quite elaborate for what is, by today's standards, a low-budget series (it wasn't in the mid 70s, but things have moved on a great deal on that score since).
As ever, given the compact running time there are some small plot holes that don't have time to be filled and some perfunctory moments that given another 30 mins would have been more convincing and. It's a story line that could be reworked into a good 90 minute movie and would still remain taut and brisk.
So don't give up on that final series of THRILLER, it pays off at the end!