Probably trying to hide the future shown in "The Omega Man".
I just used google to search for the cast of “Soylent Green.” It seems that Heston was just a bit player in the film. Same with:airport 1975 cast10 commandments 1956 castplanet of the apes 1968 casttouch of evil cast
Hmm. Are you sure? If so, Google likely got it wrong. He may have done some Cameos at the peak or towards the end of his career. A bit player is only slightly more than a walk-on. According to IMDB he was one of the three stars of Soylent Greene. https://www.imdb.com/title/tt0070723/?ref_=nm_flmg_t_65_act
This isn't about IMDB.Google didn't get it wrong; they're manipulating the search results.