Build a movie plot around this: What is Damien's cousins name? Mark
A:
A week after the burial of Robert and Katherine Thorn, archeologist Carl Bugenhagen (Leo McKern) learns of the survival of their adopted son Damien. Confiding to his friend Michael Morgan (Ian Hendry) that Damien is the Antichrist, Bugenhagen attempts to convince him to give Damien's guardian a box containing the means to kill Damien. As Morgan is unconvinced, Bugenhagen takes him to some local ruins to see the mural of Yigael's Wall, which was said to have been drawn by one who saw the Devil and had visions of the Antichrist as he would appear from birth to death. Though Morgan believes him upon seeing an ancient depiction of the Antichrist with Damien's face, both he and Bugenhagen are buried alive as the tunnel collapses on them.Seven years later, the 12-year old Damien (Jonathan Scott-Taylor) is living with his uncle, industrialist Richard Thorn (William Holden) and his wife, Ann (Lee Grant). Damien gets along well with his cousin Mark (Lucas Donat), Richard's son from his first marriage, with whom he is enrolled in a military academy. However, Damien is despised by Richard's aunt, Marion (Sylvia Sidney), who sees him as a bad influence on Mark. Though Marion threatens to cut Richard out of her will if he does not separate the two boys, she dies of a heart attack while visited by a raven in the dead of night. Soon after, through his friend and curator of the Thorn Museum, Dr. Charles Warren (Nicholas Pryor), Richard is introduced to journalist Joan Hart (Elizabeth Shephard). Hart was a colleague of Keith Jennings, the journalist decapitated seven years previously after befriending Robert Thorn to investigate the circumstances surrounding Damien's birth and adoption by the Thorns. Hart has pieced together the circumstances of Jennings' death after seeing Yigael's Wall. Though no one believes her, Joan believes she may have been mistaken about Damien until she sees his face at his school and drives off in a panic. On the road, after her car's engine mysteriously dies, Joan is attacked by the raven as it...