The infiltration of Saint Lucy's hospital on the planet Ariel was undertaken by the crew of the Firefly-class transport ship Serenity in 2517. The theft was planned by Dr. Simon Tam, who educated the rest of the crew about which medical supplies would fetch the highest prices on the black market. His payment for his role in the theft was to get some time using the hospital's advanced 3-D neuroimager and download a scan of the brain of his sister, River Tam, which had been tampered with by Dr. Mathias some time prior. The infiltration required an immense amount of planning, including the falsification of documents, the purchase of medic outfits and gear, the re-creation of an emergency flight craft, and—seemingly most difficult of all—the memorization of medical jargon.