 Lister stipulates it was essential when he reveals he found a wedding photo in the quarters of Kristine Kochanski (Clare Grogan), in which he was her groom, suspecting time travel is going to happen soon.Rimmer questions why reading the diary is essential, to which Lister points out it might be linked to his entry regarding the hallucinogenic mushroom incident - three million years in the past, Lister had been reprimanded by Captain Hollister (Mac McDonald) for giving Rimmer hallucinogenic mushrooms that led to him attacking two officers.Lister points out that Rimmer wrote about seeing himself as a hologram coming out of the table in their quarters, when he returned from the Captain's office, and hearing him state that he had come to the past from a stasis leak they had found.