Trivia: The Doctor Who story "Fury From the Deep" was the first to feature the Doctor's favourite gadget, the "Sonic Screwdriver". The "Sonic Screwdriver" has popped up in Doctor Who stories many times since...even as recently as the 1996 TV Movie of Doctor Who (the one that starred Paul McGann as the Doctor). Sadly, it cannot be seen in "Fury from The Deep" as every episode of that story was destroyed by the BBC in 1977.
Trivia: Only episode one of this six part Doctor Who story survives, but it has been digitally restored by the BBC to 'broadcast quality'. Indeed, it WAS broadcast on the BBC's digital channel BBC4 as recently as June 26, 2004, as part of that channel's Sixties Season.