Nick Stringer who plays Jumbo Mills also appeared in the first season episode "Go West Young Man (1981)" as the 'poor unfortunate' who buys a second hand car from Del boy.
Watched by 18.8 million viewers.
When Del tells Rodney and uncle Albert they are moving to Australia, he sings a line from the song 'Sun Arise' made famous by Rolf Harris, who often played the didgeridoo, hence the exaggerated last word of the line.
Watched by 18.8 million viewers, it was the last standard episode of the show until "Yuppy Love (1989)". All the episodes in between were standalone Christmas specials. Also, the last 30-minute episode.