episode - n. an event or a short period of time that is important or unusual

interbreed - v. to breed or cause to breed with another of a different race or species

theorize - v. to think of or suggest ideas about what is possibly true or real : to form or suggest a theory about something

DNA - n. a substance that carries genetic information in the cells of plants and animals — often used before another noun

author - n. a person who has written something

hull - n. the main body of a boat or ship, including the bottom, sides, and deck but not the masts and other parts