Berserk!

Berserk also known as Circus of Blood is a 1967 British Technicolor thriller film starring Joan Crawford, Ty Hardin, and Judy Geeson in a macabre motherdaughter tale about a circus plagued with murders. The screenplay was written by Herman Cohen and Aben Kandel, and the film directed by Jim OConnolly. Berserk marks Crawfords secondtolast bigscreen appearance.

When tightrope walker Gaspar the Great falls to his death, it appears that his tightrope might have been purposely weakened. Monicas unemotional reaction to the tragedy alarms Dorando. When she suggests it will be good for business, he asks her to buy him out, which she refuses to do.Monica hires a new highwire walker, Frank Hawkins Ty Hardin. Not only is he handsome, he is daring, doing his act over a carpet of sharp bayonets. Monica is impressed, especially by his physical appearance. Shortly after an argument, Dorando is found gruesomely murdered. Suspicion of Monicas guilt grows. Frank in particular suspects her, having seen her leaving Dorandos trailer before the body was discovered. He confronts Monica, demanding a share in the circus for his silence. ........

Source: Wikipedia