Mark Eugene O'Connell, formerly known as Mark Gehred-O'Connell, is an American screenwriter and author, best known for his work on the TV series 'Star Trek: Deep Space Nine' and his biography of astronomer and ufologist J. Allen Hynek.
as Self - Author, J. Allen Hynek Biography
Feb 13, 2023
as Self - UFO Historian
Jan 10, 2021
Co-Executive Producer
Story, Teleplay, Writer
Jan 3, 1993
