Jeremy Clyde, in addition to being the great-great-great-grandson of the Duke of Wellington, was, in the 1960s, half of the popular folk-singing duo, Chad and Jeremy.
The puppeteers used for this episode (who were uncredited) were Jane Tyson ans Juliette Middleton.
Mia Nadasi, the actress who plays Viktoria, was married to episode director Peter Sasdy.
Joan Woodgate again served as the (uncredited) dog handler for this episode.
Countess Ilona's dog was trained by Joan Woodgate, who was uncredited.
A DVD box-set of this series is to be issued by the British Film Institute in November, 2013.