S5, E10: The team searches for Audrey West (TRACY MIDDENDORF), a young mother with one month to live. She was last seen leaving a gathering of fellow cancer patients with Ryan (TODD LOWE - "Gilmore Girls"), a guy who crashed the party and stole some of the attendees' prescription drugs. While the team tries to locate Ryan, who they learn is the drug-addicted boyfriend of Audrey's hospice nurse, they also want to question Audrey's boss, renowned architect Brian Gaghan (JOHN de LANCIE - "Star Trek: The Next Generation"), who had accused Audrey of stealing files and blackmailing him. Meanwhile, Vivian is flooded with disturbing memories of her own health crisis. SILAS WEIR MITCHELL ("Prison Break") guest stars as Audrey's hospice support group leader, Luke.