This is the first of back to back episodes for Richard Hampton who plays the patient in this program, S1 E2. In the very next episode, S1 E3, William and Mary (1979) he plays Arthur Baxter.
The first of two appearances in this first series by Julie Harris, the second being S1 E9, The Way Up to Heaven (1979).
This story was also adapted for the American series, Alfred Hitchcock Presents (S6 E1), in 1960.
Likely to have been the last filming by Frederick Farley (the pawnbroker). By the time this episode premiered he had been dead for eight months.