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In previous episodes, Caroline's ex-husband, Michael is played by Nicky Henson; in this episode he is played by a different actor.
The soft drink wwhich Caroline is trying to market is called "Le-Whizz".
The quote on the back of the watch that Caroline gives to Charlie says "It's time I said I love you"
In the US version of The Upper Hand, "Who's the Boss?", Katherine Helmond plays the equivalent part of Laura.
We find out in this episode that Carolines' address is "The Old Barn, Oak Hills, Henley-on-Thames"
Caroline sings "Working for the Yankee Dollar" and Charlie sings "The Lady is a Tramp" in this episode.
When Suzanne and Caroline are talking by the door, there is a visible shadow of someone (Brian) outside waiting around for his cue to ring the doorbell.
At the party Charlie's glass goes from being half full to empty, and the punch goes from being pink to red.
When Charlie puts Caroline to bed she is still wearing her black dress but when we see her wake up in the morning she is wearing a white shirt.
This is the first time that we see the registration plate of Caroline's Blue Jaguar XJS - G465 RAL