HOW I MET YOUR MOTHER Season 9 Episode 8 The Lighthouse Photos : “The Lighthouse” — When Robin and Loretta’s conflict escalates, Barney is caught in the middle. Meanwhile, Marshall and Daphne deal with a stowaway on their road trip, and Ted and Cassie try to enjoy a trip to a lighthouse, on the final season of HOW I MET YOUR MOTHER, Monday, Nov. 4 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Frances Conroy returns as Barney’s mother, Loretta, and Anna Camp guest stars as Cassie, Ted’s weekend date.
