Mark Lenard

Mark Lenard was an American actor, primarily in television.

Lenard was born Leonard Rosenson in Chicago, Illinois, the son of a Russian Jewish immigrant, Abraham, and his wife, Bessie, but was raised in the small town of South Haven, Michigan, where his family owned a tourist resort. He joined the United States Army in 1943 and trained to be a paratrooper during World War II but did not see actual combat and was discharged in 1946 as a technical sergeant.

Source: Wikipedia