The clinical literature on the phenomenology of intrusive memories and intrusive images was reviewed systematically. The methodology adopted in the literature is described before presenting the phenomenological findings of intrusive memories and intrusive images across the following categories: 1) prevalence, 2) sensory qualities, 3) emotions and 4) characteristics. The similarities and differences between intrusive memories and intrusive images across clinical disorders are discussed. It is then considered whether intrusive memories and intrusive images represent separate phenomenon and a pragmatic model is briefly presented to conceptualise the distinctions that may exist. Finally, areas of further research are presented.