This is the first episode that we learn that Jonathan Smith's human name was Arthur Thompson (Sept. 7 1917 - March 21, 1948). He died at the age of 30. Actress Dorothy McGuire (Jane Thompson) was born the year before him.
When Jonathan and Jane are in the cinema the piped music playing in the background is the Highway To Heaven theme.
This is the second time Jonathan gets emotionally involved with a woman. The first time was in Season 1, "One Winged Angel".
Life imitates art. Michael Landon's character died young of cancer, and so did he in real life just 5 short years later.