Jason Voorhees arrived to read for the character of Jack. Before he could get started, Cunningham walked in and offered him a different part: Jason. Without having read a single word, Cunningham just looked at Ari and said, "You're the right size, you've got it." In the original "Friday the 13th", Ari Lehman is seen only in a brief flashback as the surprise ending. Subsequent actors who portrayed a young Jason include Timothy Burr Mirkovich in "Jason Takes Manhattan" and Spencer Stump in "Freddy vs. Jason". The adult role of Jason Voorhees has been played by various actors, some not credited, others
Jason Voorhees Jarvis (John Shepherd), who was committed to a mental hospital after the events of "The Final Chapter", and has grown up constantly afraid that Jason (Tom Morga) will return. Jason's body was supposedly cremated after Tommy killed him. Roy Burns (Dick Wieand) uses Jason's persona to become a copycat killer at the halfway home to which Tommy was moved. Jason appears in the film only through Tommy's dreams and hallucinations. In "" (1986), Tommy (Thom Mathews), who has run away from a mental institution, visits Jason's grave and learns that Jason's body was never actually cremated, but buried in a