In this episode Vincent has his first close encounter with a (relatively) friendly alien in the person of Vicki, played by Suzanne Pleshette. (She will later appear in the Season 2 episode The Pursued as a different alien.) We also get our first good look at the outside of one of the aliens' saucers as well as a relatively large and bulky version of their disintegrator weapons. Vincent also finds out what happens to aliens who die on Earth. In future episodes, the ultimate test of whether someone he meets is an alien or not will be the fiery vanishing of its body when it is killed.
In all, both Vincent and the viewer learn a great deal more about the aliens' technology, their strengths and weaknesses--and that not all of them are as ruthless as the ones seen so far. The existence of Invaders willing to at least consider working with humanity instead of exterminating it that is depicted in later episodes, such as Summit Meeting or The Life Seekers, is foreshadowed by this one.