
John Whitin Lasell Jr. (November 6, 1928 - October 4, 2024) was an American film and television actor, known for playing vampire hunter Dr. Peter Guthrie in the American soap opera television series Dark Shadows.

Topaz
1969 · as State Department Official (uncredited)

The Organization
1971 · as Zach Mills

Honky
1971 · as Archer Divine

The Harness
1971 · as Minister

Fear on Trial
1975

Suppose They Gave a War and Nobody Came?
1970 · as Dr. Hillery

Message to My Daughter
1973 · as Doctor

A Great American Tragedy
1972

Deathmaster
1972 · as Sgt. Kelly

Lassie: Joyous Sound
1972 · as Dr. Robbins

Dan August: Once Is Never Enough
1980 · as Wedlock

The Psychiatrist: God Bless the Children
1970 · as Maxwell