 In 2003, Griffin performed a one-woman show, "Caitlin", based on the life of Caitlin Macnamara, wife of Dylan Thomas; the "Western Mail" praised her "finely-honed and perceptive performance".She reprised the show in 2014 to mark the centenary of Dylan Thomas's birth.In 2005, Griffin played Karen in "Little White Lies", which she also wrote.