Complex sentence: Each episode, which were largely improvised, were usually focused around the major political news of the week, which required that the show be shot within 10 days of its air date in order to keep the episode fresh with current events.
Split into simpler sentences: Each episode, which was largely improvised, usually focused around the major political news of the week. This required that the show be shot within 10 days of its air date in order to keep the episode fresh with current events.