John Beck (born January 28, 1943) played the recurring part of Barnes-Wentworth Oil corparate partner Mark Graison on the CBS-TV series Dallas in a total of 67 episodes from Season 6 through Season 8, which is now referred to as the notorious "dream season" where all of the events, which included the divorce and death of Bobby Ewing, and the courtship and planned wedding of Pamela Barnes Ewing and Graison, was all just a nightmare of Pam's, as Patrick Duffy returned to reprise his role as Bobby at the beginning of Season 9. Reared in Joliet, Illinois, Having become widely known worldwide for his role of Mark Graison in CBS's Dallas series during the middle 1980s. He often has portrayed hard-ball businessmen.