Yeah, but i do think for the most part they film the episodes one at a time. They are working on more then one at a time in that they are writing for the next one, doing post production on the last one, and filming the current one. But i do think other then that they are filming one at a time with maybe a little crossover at the beginning and end of filming. They are filming 204 right now though. They most likely do not even have 201 completely finished yet though.