Cummings was born in 1928 in England.
He did stunts from 1962-1967, for a total of 5 years.
In 1965, 37-year-old Bill Cummings was called over to Elstree Studios, to play Quist.
The stuntman was paid $450 to jump into the shark pool. Due to the dangers on the set, Cummings demanded an extra fee £250 to double for Largo's sidekick Quist as he was dropped into the pool of sharks.
William Cummings died at the age of 74 on September 7, 2002.