One term you'll hear a lot in the world of TV writing is "breaking the epic." Master of None's Alan Yang breaks down how it's done.
The opening credits on most TV shows often come with a side order of lies. The main offender is the "written-by" credit. It's a suspiciously narrow designation that suggests one or possibly two epic-artisans painstakingly handcrafted every plot-point,every turn, and every string of sparkling banter that perform up the episode all on their own. Barring some exceptions, and what actually happens is an entire writers room full of interlocking personality types forms like a comedy Voltron to pitch and polish ideas until one or two writers have enough fabric to move off and write up a draft. It's a process that's known as breaking a epic,and it is incredibly difficult to do.
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Source: fastcompany.com