"Day One" is the thirty-eighth episode of Lloyd in Space.
Lloyd remembers an incident from back in first grade that led to him becoming unpopular to the present day, so Douglas builds him a traveling time communicating watch which will able to take him to any time he wants. He then goes back to the year he first came into school and stop his little self from tripping over Rodney's foot and ruining Brittany's picture and he becomes popular. But Lloyd feels bad for his former friends because he didn't become friends with them due to his newfound popularity, so yet again he tries to go back to the time he came back into school to make the things the way they were and make himself unpopular again.
- This episode reveals that Lloyd, Eddie, Douglas, Kurt, Brittany, Rodney, Megan, Violet, Elmer, Marcus, Jake, Mendel, Geneveeve, Lou, Benny, Grace, and almost every other recurring or minor character of Luna Vista have known each other since as far back as elementary school. This also more or less revelates how much of an impacting role Lloyd has provided for Eddie, Douglas, and Kurt in being friends with them.
- This episode marks Francine's final appearance on the show.
- This episode somewhat contradicts to Love Beam Number 9 in which it is said that Lloyd and Brittany knew each other since they were both 5 years old, meaning that they would have been as young as Pre-K or kindergarten. Here though, it is shown that they first met during 1st grade, meaning they would have been as young as 6-7 years.