“The Rough Patch” — After Barney (Neil Patrick Harris) and Robin (Cobie Smulders) hit a rough patch in their relationship, Lily devises the perfect plan to break them up, calling in help from Robin’s famous friend, Alan Thicke, on HOW I MET YOUR MOTHER, Monday, Nov. 9 (8:00-8:30 PM, ET/PT) on the CBS Telev