Anthony Zerbe (James Conway) and Len Wayland (Jonathan), who played the ecumenical clergymen, worked together again several years later in Silent Kill (1975).
Second and final series appearance for Geoffrey Lewis (Killer), but the first in his decade of collaboration with Anthony Zerbe (James Conway). Lewis and Zerbe later appeared together in Mayday (1975), The Winds of Death (1979), and The Return of the Man from U.N.C.L.E.: The Fifteen Years Later Affair (1983).