This is an interesting episode that is typical author Elspith Eric drama- very moody, very vague, very bleak. I think there is a homosexual sub context here. If you listen closely to Doris, the wife of the agent/friend of Evan, you see that she several times alludes to her belief that her husband has homosexual desires for Evan, that he is a closet homosexual. His description of his relationship with his wife Doris as close companions is also an allusion. Also, very often he keeps repeating too often that he is Evans "Friend" that he likes him and does everything for him because he is his "friend". So there is a lot of layers here, and the end seems to imply the agent going back into the closet and turning to a family life, which is very 1970's. So I think the episode is not really about Evan but about the "friend".