John Maloney Is the Ex-Husband of Legendary Actress June Lockhart. John Maloney’s Ex-Wife Is an Actress Who Gained Popularity Primarily in 1950S and 1960S Tv, but with Memorable Performances on Stage and in Film as Well. June Is Remembered as the Mother on Two Tv Series, Lassie and Lost in Space. She Also Portrayed Dr. Janet Craig on the Hit Cbs Television Sitcom Petticoat Junction from 1968-1970.