Carol shows Gail and Melissa the map of grocery stores within a 50 mile radius of their house. The two don't want to go supply shopping, but the chore wheel says it is their turn.
Tandy and Mike have an argument because Tandy doesn't want Mike to leave the gang. Mike says he wants to leave because he is jealous of Tandy and wants a family.
Tandy is reluctant to have the group split up to investigate new signs of life. "The Last Man on Earth" is the 16th episode of the show's fourth season.