My Blood Runs Cold 1965

Wealthy, reckless Californian Julie Merriday, accompanied by her boyfriend Harry Lindsay, an attorney, narrowly avoids crashing into a motorcycle driven by young Ben Gunther. Ben temporarily abandons his damaged cycle and accepts a ride from Julie but insists upon calling her Barbara. Later, at the Merriday beach house, Julie's Aunt Sarah tells Julie that her great great grandmother was named Barbara, and furthermore, that ancestress had an illegitimate child fathered by one Benjamin Gunther.

Cast:

Troy Donahue
Ben Gunther 

Joey Heatherton
Julie Merriday 

Barry Sullivan
Julian Merriday 

Nicolas Coster
Harry Lindsay 

Jeanette Nolan
Sarah Merriday 

Russell Thorson
Sheriff R. Seaton