1850 Porter Valley Drive was the address of a motel that Jack Bauer and Wayne Palmer went to during Day 5. After rescuing Evelyn Martin from Christopher Henderson at 4615 Tarpin Street, Jack and Wayne needed to find somewhere to tend to Evelyn's wound. They stopped at the motel as there was a curfew in effect, and took Evelyn and her daughter Amy into a room. Jack saw to her wound, and Evelyn told them that she had a recording hidden at a safety deposit box at the City Trust and Savings bank. They left to go to the bank manager's house.