The Omen (1976)
Director : Don Taylor

An American ambassador learns to his horror that his son is actually the
literal Antichrist.

Omen II (1978)
Director : Don Taylor

Seven years later, Damien is just discovering who he really is, and what he
is destined to do. Now living with his Aunt, Uncle, and cousin, Damien is
anxious to inherit everything. Can Richard Thorn finish the job that Damien's
father (Ambassador Thorn) started?

The Final Conflict (1981)
Director : Graham Baker

Now come into his full knowledge and power, the Anti-Christ in the body of
Damien Thorne is about to strike his final blow. The Christ-child has been
born again, on the Angel Isle, England. The plan is simple, find the male
children born on the specified day, and kill them all.