Very briefly seen in a party scene in this episode is "Dr. Emil Savundra", a friend of Stephen Ward's. His identity is not explained. Savundra (who was not, in fact, a doctor) was a Sri Lankan swindler who had founded the Fire, Auto and Marine insurance company in order to defraud its customers. The bankruptcy of the company, several years after the time of this episode, was supposed to prevent him being prosecuted, but his appearance in a television interview with David Frost, where he showed no remorse over his actions, led to his being imprisoned in 1968. He was released from jail in 1974 and died two years later, aged 53.
Emilia Fox and William Gaminara appeared together as Nikki and Leo in Silent Witness.