In the fourth interview session, conducted on April 9, 2015, Hubel continues to discuss practicing law with the Mitchell, Lang & Smith law firm. He talks about the growth of the firm, including lawyers he worked with; about cases he worked on, particularly regarding toxic chemical exposure; and about judges he argued before, including Shirley Field. He also talks about how the use of computers in the 1980s and the Internet in the 1990s changed the way he practiced law. He briefly speaks about his marriage to Marcia Maring, and then discusses practicing law in Bend as a partner with Karnopp, Petersen, Noteboom, Hubel, et al. He speaks at length about a case he worked on regarding skiing on Mt. Bachelor.