This episode contains: explanation of time dilation, relative velocity, gravitational time dilation, bowling balls and mattresses, Interstellar recap, wormhole in 3 dimensions, galactic spacing, layout of the new solar system, space travel times, artificial gravity and the Endurance, explosions and shuttle thrusters, the fuel problem, the 5th dimension, Factoring Humanity by Robert Sawyer, tesseract, future timeline, Apollo moon landings, Futurama quote, what Devon learned.