The classical piano piece that plays when Steve sees the picture of the woman in the hotel lobby is "Rhapsody on a Theme of Paganini, Op. 43, 18th Variation" by Sergei Rachmaninoff.
When Stan and Francine woke up from Roger's farts, it was 4:15am.
When Francine is driving off to start her new life, you can see a sign for "Clouden's Fine French Cuisine" across the street from the hotel. This is a nod to Rodney Clouden, who directed this episode.
The brochure that Héctor Elizondo accidentally shows Steve and Francine before giving them the one on time travel reads "THE PRESIDENTIAL PENIS MUSEUM - Meet The REAL Heads of State!" with a picture of Abraham Lincoln and George Washington looking inside their pants. The brochures that are located at the concierge desk: [top row] "THE PRESIDENTIAL PENIS MUSEUM", Beetman from "Stan Time", "Stay Healthy" - an anti-smoking brochure. [middle row] "Time Travel", "Mount Rushmore", "Balloon Rides". [bottom row] "Wine Country" from "Merlot Down Dirty Shame", "Horse & Pony Show", "Visit New York".
When Future Francine returns to the hotel, Héctor mentions that its "been 10 years and 3 more Garry Marshall movies". This is a nod to Héctor's working relationship with movie director Garry Marshall, as he is considered Marshall's good luck charm and has appeared in virtually every Garry Marshall film since the mid 1980s.