This paper looks at how the concepts of repetition and temporality were being conceptualised at the early stage of Lacan’s work in terms of his interest in cybernetics, and explores how repetition and temporality were being brought together within the overarching framework presented in the postface to the seminar on The Purloined Letter. Consideration is given to how Lacan theorises the automatic, autonomous nature of unconscious contents, their timeless indestructible character, and the distinction between conscious and unconscious memory. Adding to this Freud’s concept of Nachträglichkeit, the author looks at the difficulties in conceptualising a psychoanalytic notion of time within the context of repetition compulsion.