Lotus Esprit: The Spy Who Loved Me (1977)
The Lotus Esprit and its underwater exploits are second only to the DB5 in the Bond car hall of fame. To escape a rocket-equipped helicopter Bond (now played for laughs by the bouffant-ed Roger Moore) drives the Esprit off a pier into the sea, where it transforms into a submarine at the flick of a switch and blows up the helicopter with its own rockets. More underwater action ensues, until Bond emerges victorious on a beach full of holidaymakers. The stars, Barbara Bach and Roger Moore, never saw the Bahamas though - they did their fighting in the sealed car in the diving pool on the grounds of Pinewood Studios in London.