Scorpion is hired by Kapper Aerospace Industries in Solvang to fix the thorium power grid in their Mars simulation biodome. When power and hence air systems fail by overload, they must extract the rowing ex-lover scientists who have been living inside for 11 months. Walter and Paige plan contrasting versions of Toby and Happy's Jack and Jill Bachelor(ette) Party: Walter with trips to the science center, planetarium and natural history museum, Paige with a party bus and look-a-like piñatas. Meanwhile, the couple prepares to move in with each other, quickly learning that they have different styles and ways of living, and worried about the dome couple's break-up over excessive proximity. Smells and oxygen-ozone mix in the dome gradually trigger Walter's memory of what really happened in space with Paige. Realizing Paige played him, Walter fires Paige at Scorpion 'having completed her job' after landing a better-paid position for her with Richard Elia; Paige storms out scolding, taking Ralph.
—KGF Vissers