A woman hopes a transatlantic cruise and holiday in London will help save her marriage.
- Adaptational Backstory Change: In the short story "Song for a Lady" by Charles Beaumont, the Ransomes are a newly married and very much in love couple on their honeymoon. In the television adaptation, their six year marriage is falling apart due to Alan being concerned with his job than with Eileen.
- Adaptation Name Change: In "Song for a Lady", the McKenzies' names are Jack and Sally. In the television adaptation, their names are Toby and Millie.
- Aww, Look! They Really Do Love Each Other: Part of the episode's plot is seeing the couple's relationship go from rock bottom to renewed, gradually realizing they still love each other.
- Composite Character: In the television adaptation, Ian Burgess and Colonel Van Vylman are merged with Burgess fulfilling the roles of both characters. In "Song for a Lady", it is Van Vylman who makes the speech lamenting that the Lady Anne's time has gone due to people spending most of their time rushing about.
- Cruel to Be Kind: The passengers and staff on the Lady Anne pull this with Eileen and Alan. They force the couple to leave the ship at gun point, but that's to keep the two young lovebirds from prematurely sharing the passengers' fate of going to the afterlife.
- Death by Adaptation: In "Song for a Lady", Burgess' wife Cynthia is still alive and accompanies him on the Lady Anne's last voyage. In the television adaptation, she died several weeks prior to the cruise. This change is as a result of Burgess' character being merged with Colonel Van Vylman.
- Divorce Is Temporary: Played with. Alan and Eileen aren't divorced yet, though their marriage hasn't been up to par in the last six years. Nonetheless, their decision to split up doesn't last long after they have time to cool off and reconcile.
- Dramatic Irony: In-Universe. The elderly passengers are desperate to get Alan and Eileen off the Lady Anne before it's too late, knowing if the ship "reaches harbor", they'll be stuck there to say the least.
- Foreshadowing: After showing Eileen a photograph of his recently deceased wife, Ian Burgess says that he will be with her again soon. It turns out that the Lady Anne is heading to the afterlife.
- Happily Married: All of the couples who have traveled aboard the Lady Anne have had extremely happy marriages. Millie McKenzie credits the ship with enhancing her love for Toby, her husband of 53 years, and believes that every other couple onboard owes the Lady Anne a similar debt.
- Insistent Terminology: Whenever Eileen refers to the Lady Anne as "it," the McKenzies tell her that the ship is a "she."
- Locked Out of the Loop: Everybody on the Lady Anne except the Ransomes knows the ship is going to the afterlife.
- Married to the Job: Alan has paid considerably more attention to his job as a financier than his marriage to Eileen over the course of the last six years. As it had gotten to the point that they barely saw or spoke to each other, Eileen arranged the voyage on the Lady Anne and the trip to London in order to save their troubled marriage.
- Too Spicy for Yog-Sothoth: A variation of this. The elderly passengers force Alan and Eileen off the ship and into a life-boat because they're too young.
- Workaholic: Alan is this in the beginning. In fact, the whole reason he and Eileen boarded the Lady Anne in the first place was because he has a business trip in London.