(written from a Production point of view)
James Daly (23 October 1918 – 3 July 1978; age 59) played the immortal Flint in the TOS episode "Requiem for Methuselah". He filmed his scenes between Monday 2 December 1968 and Tuesday 10 December 1968 at Desilu Stage 9, Stage 10 and Paramount Stage 5.
James Daly starred in Medical Center. Many Star Trek actors acted as guest stars on the show: Fionnula Flanagan (1976), Salome Jens (two in 1975 and one in 1970), Brock Peters (1975), Meg Foster (1974 and a 1972 episode), Louise Fletcher (1973), Frank Corsentino (1971), Walter Koenig (1970), William Shatner (1970), and Bruce Davison (1970). He also filmed an episode of Mission: Impossible in 1967 as a banker setting out to form a potential Fourth Reich. He appeared in a 2-part episode of Felony Squad with Harry Townes, Karen Steele, Lawrence Montaigne, John Harmon and Vince Howard. Among his most memorable television guest spots is the classic The Twilight Zone episode, "A Stop at Willoughby". His final acting role was in Roots: The Next Generation with Paul Winfield and Brock Peters, which aired a year after his death.
Daly died of a heart attack in Nyack, New York.