- “Why don't I get Beth and we'll go out for ice cream?”
- —The last great idea that will ever be had in this garage.[src]
Diane Sanchez is a hypothetical version of the ex-wife of Rick Sanchez, the mother of Beth Smith before she became Beth Smith, the maternal grandmother of Summer Smith and Morty Smith, and possibly the ex-mother-in-law of Jerry Smith.
The manner in which Rick denies being driven by a "totally fabricated backstory" suggests that the flashback was a ruse to fool his interrogator. Therefore, it cannot be guaranteed that Diane is the real Mrs. Sanchez.
When Rick was being held in a Galactic Federation prison, Cornvelious Daniel went into Rick's memories, via a brain-link, to learn how Rick became a criminal. While Daniel was present in Rick's memories, he witnessed a flashback in which a young woman named Diane Sanchez was the wife of Rick Sanchez and the mother of Beth Smith. In that flashback, another Rick from the future vaporized Diane and Beth with a bomb, to punish Rick. Diane appeared to enjoy her husband Rick's scientific work and seemed very patient and understanding, with no reference to either a failing marriage or an extreme concern about safety.
- Rick maintains a similar appearance as a younger person via Simple Rick in "Tales From the Citadel". This supports the possibility that the real Mrs. Sanchez may have resembled Diane to an extent.
- This possibility is given further credence by "Star Mort Rickturn of the Jerri", where one of the memories Rick is seen uploading in the brain of Beth's clone shows child Beth hugging her mother, who looks like Diane seen from the back.