When McGarrett and Danno are hurled back by the explosion in front of Llacuna's house, it is obvious they are stunt doubles. The hair of MacArthur's double is grayish and totally different than MacArthur's curly style, and the hair of Lord's double is quite red.
Simon Oakland and Barry Atwater worked together in The Night Stalker (1972).
Simon Oakland and Joe Maross also acted together in the"Mission Impossible" season one show "The Frame".
While Teru Shimada (Hatsuo Shigato/Kim Rashiri) is a major character in the show with considerable screen time, his name appears in the supporting player credits in smaller type.
The three former POW's in this episode are portrayed by Simon Oakland, Barry Atwater and Joe Maross, all who appeared in different episodes of The Twilight Zone, original series.