Following this film Corbucci wrote a parody of Our Man Flint called Il vostro super agente Flit (1966), directed by Mariano Laurenti.

Spring and Tont become rivals for the romantic attention of Nurse Clarissa with each attempting to injure or kill each other when engaged in their therapeutic treatments.

The British Secret Service revives Tont who has only been cryogenically frozen but uses his well publicised death to enable him to infiltrate a criminal scheme to attack an unknown religious centre in a project called "Operazione D.U.E./Operation T.W.O.".

Tont travels to London disguised as a beatnik named "Bingo Kowalski" in order to infiltrate a group of young hipsters suspected in stealing the first component of the weapon.

Spring's scheme is for his agent to hijack an American space capsule launched from Cape Kennedy that contains the final element needed to create the synchrophasertron.