Ho Yay: Scrooge and Marley click immediately when they meet as young men, Marley spends his last breath trying to warn Scrooge of his fate, and while Alice is still alive in the present day Scrooge doesn't visit her.
Scrooge and Marley offer to bail the Mercantile Association out of the debt caused by Jorkin's embezzlement, provided they'll be allowed to buy up 51% of the total stock. They'll only save the company if they can become the company, and both look really pleased about it.
Jorkin himself, a charming, jovial unrepentant embezzler who groomed Scrooge and Marley, playing on their greed and misanthropy, to become his Bastard Understudies.
Jacob Marley's haunting. It really can't be at all frightening with how over-the-top he is. He needn't have shouted so much, or wailed at such a high pitch with his hand to his forehead like a stereotypical Drama Queen.
This line when Young Ebenezer sees his sister Fan all grown up. The Foreshadowing is anything but subtle.
"Mama must have looked as you do just before she died."
After the Spirit of Christmas Present leaves, Scrooge runs towards the camera and stops cold when the Spirit of Christmas Yet to Come's hand appears in the foreground, blurred to the audience with nothing else of it visible.
One-Scene Wonder: To an absurd degree. There's a maid that takes Scrooge's coat when he arrives at Fred's house and happily nods for him to go into the party. There were lengthy blog posts and discussions about who the actress was, due to her resemblance to Audrey Hepburn. She was eventually found out here, identified as Theresa Derrington.
Vindicated by Cable / Vindicated by History: While a hit in the UK, it performed poorly in the US. After repeat broadcasts on US television from the 1950s onward, it's considered one of the best adaptations of A Christmas Carol ever made.