This is the moment that Roger discovered his ability to fool others with this disguises. At the same time, a younger Avery Bullock also tracks Roger down, but is distracted by Roger's first disguise. Meanwhile, he is still being pursued by the other shapeshifting alien, that is seeking revenge for Roger presumably killing its young. While Roger is alone in the desert, he comes across a Bible salesman and is taken to his home, full of other characters with questionable and shady backstories.
He crash lands in Roswell, New Mexico, which parodies the famous Roswell incident. In 1947, while being pursued by a vengeful shapeshifting creature, Roger escapes to Earth. The episode 'Fellow Traveler' gives Roger his backstory on how he reached Earth.