Henry R. Schrader is Walt and Skyler's brother-in-law and Marie's husband, who works as a U.S. Drug Enforcement Administration (DEA) agent. He is involved in investigating a meth dealer known as "Heisenberg," unaware for over a year that his prey is actually Walter. Hank has a cavalier exterior, but in reality the dark side of his job affects him more than he cares to admit leading him to have anxiety attacks from post-traumatic stress.