Throughout the first half of this episode, all I could think of was: Have they not seen the movie Primer (2004)? If not, please do so immediately! One of the most mind-bending time travel movies ever made, it deals with the subject of traveling into the recent past and how you might deal with alternate copies of yourself. Also an amazing example of extremely low-budget filmmaking.
Also, the childhood spaghetti incident recalls the Sapienza mission of the recent Hitman game, where the mad scientist guy you have to kill is obsessed with recreating his mom's spaghetti recipe.