Pete Duel's dog Carroll makes a brief guest appearance in this episode. She is an attractive mixed breed and was named after the writer, Lewis Carroll. She died in 1978/79.
Kid: What's that you're reading?
Heyes: 'Life On The Mississippi' by Mark Twain.
Kid Mark Twain?!!
Kid Mark Twain - now there's an alias if I ever heard one. I wonder what he's wanted for?!!
The title for this episode is an allusion to a line in the chorus of the Beatles song, Strawberry Fields Forever.
The Chorus goes:
Let me take you down
'cause I'm going to
Nothing is real and nothing to get hung about
Strawberry fields forever
In the book which Heyes is reading 'Life On The Mississippi' by Mark Twain, an early allusion to the detection of criminals by the use of fingerprints is made; this becomes an important motif in this episode.