'Running in the Fast Lane': Betty convinces Archie to do a marathon with her, but can Archie keep from 'running on empty'?! Then the 'yolks' on Archie when Professor Flutesnoot has the students take care of eggs to learn about responsibility in 'An Egg-Cellent Assignment!' Finally, Archie's not the paranoid type... he's just absolutely certain that Veronica has chosen 'The Replacement!'