Lewis refers to JRR Tolkien as "John". He was known as "Ronald" to his friends.
The movie shows Londoners fleeing to air raid shelters, responding to what turns out to be a false alarm. Later, Prime Minister Chamberlain announces on the radio that Britain is at war with Germany. In truth, the air raid incident occurred shortly after Chamberlain's speech.
Sigmund Freud recalls to Anna Freud their previous meeting with Albert Einstein where Einstein says that the definition of insanity is doing the same thing and expecting different results. Though this is a quotation often attributed to Albert Einstein, it more likely originates from Al-Anon and Narcotics Anonymous groups in the early 1980s.
Several times, Freud turns on the wireless (as radios were then called) and instantly hears the broadcast. A wireless of that era would take some time to "warm up" before it was able to receive anything.
On the platform for his return journey from London to Oxford the train pulls into the station showing the logo of the National railway of the Republic of Ireland at that time.
Lewis is shown researching the Gospels while a woman who appears to be his wife calls him to bed. This film takes place in 1939, but Lewis did not marry Joy Davidman Gresham until 1956. The woman was actually Janie Moore, who Lewis lived with until 1949.
About half way through the film, Anna Freud's lover, Dorothy Burlingame, tells Anna that her relationship with her father (Sigmund Freud) is marked by "codependency". This term was coined in the 1970s, and like the apocryphal quote attributed to Albert Einstein in the film came out of Alcoholics Anonymous.