I watched this too..
If I remember correctly, it was a team of divers investigating some 'curse'

Fascinating stuff.
(danniekavanagh did nothing constructive on, Sat 1 Mar 2014, 12:46, 1 reply)

Urk!!
www.channel5.com/shows/monty-halls-and/episodes/monty-halls-and-the-divers-graveyard
( Jabberwoc misses D.R. and Quinch, Sat 1 Mar 2014, 21:28, closed)

That's the one!
I think what I found more disturbing was when it showed the other deep sea divers picking up all the discarded weights at the bottom of the sea bed..
(danniekavanagh did nothing constructive on, Sat 1 Mar 2014, 21:44, closed)