Carry On Regardless was the fifth in the series of Carry On films to be made being released in 1961. By now a fairly regular team was established with Sid James, Kenneth Connor, Charles Hawtrey, Joan Sims and Kenneth Williams all having appeared in previous entries. Hattie Jacques – who was also a regular – makes a cameo appearance during a hospital scene. "Professor" Stanley Unwin appears in a guest role, playing his trademark "gobbledegook" speaking act.