Just for the record, The Wild Wild Planet (or simply Wild Wild Planet in some markets) enjoyed its silver screen premiere on July 10th when it played for audiences in attendance of the Trieste Sci-fi Film Festival in Italy. Margheriti directed a script from Ivan Reiner and Renato Moretti, and the film starred Tony Russel, Lisa Gastoni, Massimo Serato, Carlo Giustini, and Franco Nero. According to our friends at IMDB.com, here's the plot summary:
"A deranged scientist is using his employer's top-secret bio-laboratory to engage in clandestine experiments. When he starts kidnapping leading citizens for use in his twisted tests, it's up to rogue cop Mike Halstead to come to the rescue."
From what I've come to understand, The Wild Wild Planet was the first of four films all centered around some adventures in space set aboard the Gamma One Space Station. Utilizing one central setting allowed the four films to re-use some of the props, costumes, and settings -- thus keeping the budgets under reasonable control -- while bringing aboard different cast members. The Wild Wild Planet (1966) was followed by War Of The Planets (1966), War Between The Planets (1966), and -- finally -- Snow Devils (1967). The features were all produced by Mercury Film International and Southern Cross Feature Film Company while being released theatrically under the Metro-Goldwyn-Mayer (MGM) banner.