After being arrested and charged with "foul atheism" and fornication, Casanova is sentenced to five years imprisonment at "The Leads": the most notorious of Venetian gaols. Brutalised by Lorenzo the gaoler and devoid of hope under the harsh prison regime, Casanova's mind wanders back to his past loves and adventures. He finds himself haunted by the memory of Christina, a simple country girl he gave to another rather than marry her himself.
Episode two: "One at a Time"
Casanova receives a new cellmate in the form of Schalon, a corrupt insurance broker, and reflects on his seduction of three daughters at a house in Grenoble.
Episode three: "Magic Moments"
Casanova is irritated by his constantly complaining cell mate Schalon and remembers how he once pretended to be a magician casting a spell to seduce the virgin daughter of an old naive man.
Episode four: "Window, Window"
The episode flashes back and forward between Casanova trying to seduce Anne Roman-Coupier, even though his friend strongly discourages this, and him trying to receive some books while being in prison. He is also haunted by memories of watching a man being executed and him smashing a window with a stone in Venice.
Episode five: "Fevers of Love"
While in his prison cell, Casanova is tormented by fever dreams and flashbacks to his past loves and especially his stay in London.
Episode six: "Golden Apples"
This episode flashes back and forward between Casanova finally managing to escape from his prison cell and him trying to write his memoirs in Castle of Duchcov near the end of his life as an old, dying man.
In 1966, William R. Trask published the first of his 12 volume translation of Casanova's memoirs while Potter was working as a book reviewer for The Times newspaper. Potter had been after a subject for his first drama serial and found in Casanova a suitable figure to continue the themes of sex, memory and redemption that had influenced much of his previous work. When writing the serial Potter decided not to read the story of Casanova's adventures, choosing instead to work from a list containing the names of Casanova's lovers and specific events from his life. Potter intended to explore the reason why Casanova was "driven" to have had so many sexual encounters. As a result, Potter's Casanova is far different from other interpretations of the character; he suffers from tristitia post-coitum and considers his reliance on women for sexual satisfaction a weakness. The serial includes a number of events that depart from established facts about Casanova. The series resulted in a number of complaints to the BBC. Clean-up TV campaigner Mary Whitehouse, who regularly found fault with Potter's work, thought the first two episodes "boring" and believed the third used a kind of Playboy flashback photography. She commented to a journalist from The Glasgow Herald: "Of all the characters the BBC could have chosen to dramatise Casanova is the most ridiculous."
