Several shows contain plot threads that link them together. For example, the "Innobotics arc" - the story of lifelike androids created by the Innobotics Corporation - runs through these shows: Valerie 23, Mary 25, The Hunt, In Our Own Image, and Resurrection.
Tom Butler and Paula Shaw reprise their roles as Charlie Rogers and the executive from Valerie 23 (1995). However, Charlie's surname is given as Charlie Bouton in this episode while the executive was given the name Mrs. Janus.