Which American actor was starred as Frank Cannon of "Cannon" on the first "Barnaby Jones" episode?
William Conrad William Conrad (September 27, 1920 – February 11, 1994) was an American actor, producer, and director whose career spanned five decades in radio, film, and television.
Thaao Penghlis Thaao Penghlis ( , born 15 December 1945) is an Australian actor. He is best known for roles in United States daytime soap operas such as "Days of Our Lives", "Santa Barbara", and "General Hospital", but has also guest-starred on a number of crime dramas, such as "Kojak", "Cannon", "Tenspeed and Brown Shoe", "Hart to Hart", "Nero Wolfe" and "Magnum, P.I.". He also starred in the late 1980s remake of "". Penghlis has studied under Hollywood acting teacher Milton Katselas.