He died ten years ago this year, on June 29, 2008, of a heart attack at age 65.
In ufo researcher Budd Hopkins' 1981 book, he makes the case that the year 1942 is significant in terms of several abductees being born during this year. (Look for scars on the back of their knees.)
Davis had a livelong career in many powerful roles, from Twin Peaks and Stargate, through The X-Files, The Twilight Zone, and The Outer Limits.
In 1970, Davis received a Master's Degree in Theatre from the Southern Illinois University Carbondale (SIU-C); his thesis was Design and Construction of Stage Settings for Black Comedy and The Two Executioners. He taught for several years before returning to SIU to complete a Ph.D. in Theatre; his dissertation was The Evolution of Scenography in the Western Theater.