sarabjohar
I saw the movie in early seventies. Great fun. I had forgotton the title apart from Agent WC. Found it today.

Movie spotlight
The invincible agent Cyril Juan Borguette alias W4C has been assigned a mission to go to a hotel in Prague, get hold of a saltcellar with a plan for the military exploitation of Venus hidden in it, and hand it over to the beautiful agent Alice. He will have to compete for the saltcellar with other agents working for the world's various greater and smaller powers. The head of the Prague counter-intelligence unit gets news of agent W4C's mission. Deficient in personnel, he nominates accountant Foustka as agent 13B. Mr Foustka takes his dog Pajda with him and the two head for the airport. Pajda helps him track down agent W4C in a classy hotel that becomes the battleground for the interests and plans of the secret agents from different countries, each trying to get hold of the precious saltcellar.
A suave secret agent, codenamed W4C, is tasked with infiltrating a dangerous criminal organization threatening global stability. Operating under deep cover, he must navigate a treacherous landscape of double-crosses and deadly traps. As the stakes escalate, W4C races against time to thwart the villains' nefarious plot before it's too late.
A low-budget spy thriller, 'The End of Agent W4C' is often remembered more for its B-movie charm than its critical acclaim. While it delivers some moments of pulpy excitement, its production values and narrative depth are typical of its era and genre, appealing primarily to fans of vintage espionage films.
Offers a straightforward, action-packed spy narrative.
Features a charismatic lead performance, though supporting elements can be underdeveloped.
Lacks the polish and complexity of major studio spy films but provides B-movie entertainment.
Google audience: Audience reviews are scarce for this lesser-known title. Those that exist tend to view it as a functional, if uninspired, entry in the spy genre, with some appreciating its vintage appeal.
The film was shot in and around Los Angeles, utilizing various locations that were common in independent productions of the 1960s.
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I saw the movie in early seventies. Great fun. I had forgotton the title apart from Agent WC. Found it today.