This Italian James Bond takeoff stars Helmut Lange as a girl- and gadget-happy secret agent. His mission is to retrieve a laser device from the bad guys and claim it for his own country. Barbara Lass, the unforgettable star of Werewolf in a Girl's Dormitory, is the woman in the case. The chase sequences are fun to watch, but the one-line quips lose a lot in the translation. Serenade for Two Spies gained its greatest American exposure in "Late Show" TV packages of foreign secret-agent capers of the late 1960s, hastily assembled to cash in on the Bond craze.

~ Hal Erickson, All Movie Guide