The story was an irreverent take on Charles Dickens' A Christmas Carol, featuring Sid James as Scrooge.
The 'Christmas Past' sequence reveals that Scrooge failed to invest in the schemes of Dr. Frank N. Stein, who (assisted by his servant, Count Dracula) sought to create a mate for Barbara Windsor's Monster.
The 'Christmas Present' sequence described Robert Browning's difficulties in attempting to elope with Elizabeth Barrett without funds, thanks to Scrooge's unwillingness to lend.
But Carry On producer Peter Rogers refused, giving top billing to Hattie Jacques instead.
[1] For the final original Christmas special, writer Talbot Rothwell returned, as did Sid James.
In 2005, the first four specials were released on DVD, featuring interviews with series producer Peter Rogers and stars Jack Douglas and Wendy Richard.