In contrast to Cap and Skip's unwavering desire to get to the moon, Professor Scott "Rook" Sloan has no such conviction. In the second episode, he's ready to leave the base, in part because he doesn't feel respected by the other two, and also because he's homesick for his family. As a devout Christian man wanting to spread his faith to the universe, he questions if he's truly on the right path, to the point of trying to cheat on his wife with his brief teammate Alisha (Diandra Lyle). However, as the bond between the three primary characters grows stronger, he seems to lose some of his doubt.
In the finale, Rook finally gets that respect from Cap and Skip that he'd been lacking. All throughout the climax of their rocket-fueled plan to divert the herd of cows, he's in charge of the music, but continually asks the others if it's okay to skip the song. Then, when it comes time for the final rocket launch, he asks Skip for the order to launch — but Skip leaves that choice up to him. Rook gets his moment to make a decision for the team.
Later, when they're left with one of the cows stranded in their greenhouse, the others applaud his choice to milk it. He is finally respected as part of the team.
However, earning the others' respect wasn't so much based on how he changed, but how they did. In the end, it was rather unclear what made his previous doubts vanish. His inappropriate sexual pursuit of Alisha seemingly came out of nowhere, although it may have been driven by a belief that his wife was cheating on him with their pastor. The series hinted at something happening there, but was never clear about it, and never showed a video call between them after that. Out of the three leads, Rook's character arc is the one that truly doesn't work.
