The title "Poppy" refers to the money, the score. Regan mentions this when he says the crooked banker is being careful, so he doesn't lose any of "the poppy".
When James Booth was filming his scenes near the Thames, he said in an interview that he found a real dead body floating in the river.
This edition was second in the charts with an audience of 7.9 million under the JICTAR Ratings System.
First appearance of DS Tom Daniels, played by John Alkin. He appeared in 12 episodes. The last one being Victims (1978). He also appeared in both films.