Doctor Heinrich Schäfer was a scientist that attended a museum gala in Stuttgart.
Loki came to Germany in order to find Iridium to stabilize a Tesseract-created portal. Loki arrived at the museum gala and subdued a guard before attacking Schäfer. He grabbed Schäfer and flipped him over onto one of the museum pieces, so that the doctor was lying down. He then used a device to extract Schäfer's eye and send a holographic copy to Hawkeye in order to open the vault with the iridium.