Tetrix Switch not allowed?

[Chris Fultz]

"The crew shuts down Aquarius to conserve power, subjecting them to freezing conditions. As another problem arises—the dangerous buildup of carbon dioxide exhaled by the astronauts—an engineering team quickly formulates a solution which allows the Command Module's square air cleaners to be used in the Lunar Module's round receptacles."

This describes one of my favorite movie scenes. The ground based crew has to find a solution to the air cleaner / carbon dioxide problem, and whatever solution they find has to only include materials and tools that are already on the Lunar Module or Command Module.

I think that is some pretty good / innovative engineering.