One of the ways that Darlene tries to communicate with Sir George is by use of a "Spirit Phone" that was supposedly used and endorsed by the famous Medium, Emily Tiffin, who appeared in last season's episode, "Where are you White Feather?".
Reg Lye who plays Old Gory and Ed Devereaux who plays Martin Dewey appeared together in 1964 on The Saint in an episode called "The Loving Brothers"where they play not so loving Brothers.