In the uproarious Eighth Season of How I Met Your Mother, the arrival of baby Marvin reminds Marshall and Lily of things they need, like sleep, better jobs and sex! Meanwhile Barney uses his playbook to win over Robin, but not her scary dad. Marshall tries to right a wrong in court in hopes of becoming a judge, and Robin's past is judged. Ted designs an amazing building, and also has designs on Barney's half-sister! But does he meet his future wife? Check out all 23 hilarious, legend - wait for it - dary 23 Season 8 episodes, featuring guest stars like Paul Shaffer, Ralph Macchio and Kyle MacLachlan!