[3] A French actor named Bernard (Jean-Louis Trintignant) comes across a beautiful young woman (Ewa Aulin) bending over the corpse of a murdered nightclub owner in London.

Col cuore in gola was adapted from the paperback novel Il sepolcro di carta (1955) by Sergio Donati.

"[4] In 1966, director Tinto Brass contacted Guido Crepax to draw the storyboards for the Cuol cuore in gola.

[4] For the cinematographer, Brass noted that his previous director of photography, Bruno Barcarol, had died, and he needed a new one.

[7] This is seen in Trintignant's character's home, which is decorated with older popular Hollywood actors, and the use of split screen matting to have a look similar to that of a comic strip.

[3][9] It has been released under the titles Le cœur aux lèvres and En cinquième vitesse (lit.