Who played the role of Ben Casey on the television series, "Ben Casey" in the 1960's?

Ben Casey is an American medical drama series which ran on ABC from 1961 to 1966. The show was known for its opening titles, which consisted of a hand drawing the symbols "♂, ♀, ✳, †, ∞" on a chalkboard, as cast member Sam Jaffe intoned, "Man, woman, birth, death, infinity." The series starred Vince Edwards (credited as Vincent Edwards) as medical doctor Ben Casey, a young, intense but idealistic surgeon at County General Hospital. His mentor was Doctor David Zorba, played by Sam Jaffe. The show began running multi-episode stories, starting with the first five episodes of Season 4; Casey developed a romantic relationship with Jane Hancock (Stella Stevens), who had just emerged from a coma after fifteen years. At the beginning of Season 5 (the last season), Jaffe left the show and Franchot Tone replaced Zorba as new Chief of Neurosurgery, Doctor Daniel Niles Freeland.