Act II picks up exactly where Act I concluded. Leslie and Sarah are puzzled by Nancy and Charlie's submissive behavior. As Leslie and Sarah approach, Charlie threatens to scream, while Nancy remains composed. Leslie prods both Charlie and Nancy in the side, but neither reacts. Leslie and Sarah conclude that Nancy and Charlie pose no threat.

Charlie feels uncertain about the creatures, whereas Nancy is intrigued by everything about them. Leslie and Sarah decide to approach the couple again. Leslie pokes Charlie strongly, prompting him to speak. Leslie responds multiple times, but Charlie refuses to engage with the creature. Eventually, Nancy sits up and greets Sarah. With Nancy's encouragement, Charlie finally says hello.

Sarah and Nancy believe the tension has eased, but Leslie and Charlie still feel uneasy around each other. With Nancy's encouragement, Charlie reassures Leslie that they mean no harm. Although Leslie and Sarah speak English, many of the words and concepts used by Charlie and Nancy are unfamiliar to them.

Nancy attempts to shake Leslie's flipper, but Leslie doesn't understand the gesture. Nancy and Charlie explain the idea of a handshake and mention the differences in their anatomy. The lizards have only legs and flippers. Eventually, Nancy manages to shake hands with the lizards. Charlie tries to greet Leslie with a handshake, but Leslie remains wary of him. The two discuss their differences, and Leslie inquires about their clothing. Nancy explains that clothing covers their sexual organs, among other things.

This conversation leads to a discussion about human sexual organs, particularly Nancy's breasts, which the lizards lack. Nancy shows Sarah, who is intrigued. Leslie also wants to see, but Charlie feels uneasy about it. To shift the topic, Charlie asks about their children. Sarah and Leslie have laid seven thousand eggs. Leslie is shocked to learn that humans do not lay eggs. Nancy describes human gestation and mentions that they have three children.

When Nancy explains that they care for their children for many years, she introduces the concept of love. Emotions like these are foreign to the lizards. Charlie questions how Sarah and Leslie became a pair. Leslie had to fend off other lizards when Sarah matured and was ready to mate. He desired her, but emotions were not involved.

Charlie raises the topic of infidelity in Leslie and Sarah's relationship, which disturbs Nancy. This issue also baffles Sarah and Leslie. Leslie nearly attacks Charlie when he angrily compares the male lizard to a fish. The women intervene to calm the men, and Leslie explains his disdain for fish. They then discuss the themes of prejudice and differences.

Sarah glances up and notices birds flying overhead. Leslie becomes defensive. Nancy explains to Sarah that these birds are seagulls. The women compare them to underwater rays. Nancy mentions that she has seen pictures of rays. However, Nancy and Charlie struggle to explain photography to Sarah, leading her to think they are mocking her. When Leslie returns, Sarah recounts the situation to her.

Suddenly shifting the topic, Nancy states that Charlie thinks they are dead. She continues to criticize Charlie sarcastically, suggesting that no wonders are possible. Leslie and Sarah catch on to her point to some extent, but Leslie is puzzled by the notion that reality might be an illusion. When Leslie asks Charlie to clarify, Charlie becomes upset.

Once Nancy calms him down, another jet flies overhead. Leslie and Sarah feel frightened. Nancy and Charlie explain the concept of an airplane. Charlie mentions other machines, including those that travel underwater. Nancy recounts stories from Charlie's youth when he would dive underwater and remain there. Upset with...