 The character Tom Haverford also undergoes changes during the final episodes of the season, in which the character begins to consider leaving his city hall position to pursue his own business ambitions. The storyline is advanced particularly strongly in "The Bubble", when Tom becomes frustrated with an assignment by Chris, and culminates in the season finale "Li 'l Sebastian", in which he ultimately quits the parks department to form an entertainment company. "Li'l Sebastian" ends with several cliffhanger twists including Tom's departure from city hall, Leslie being approached to run for office, and the arrival of Ron's first ex-wife Tammy, although the actress who will play her was not revealed. Schur said the writing staff had a general idea of where the newly introduced storylines should go, but the exact stories had not been completely worked out yet when the episodes broadcast. Schur said they sought to "write the juiciest, most exciting cliffhanger-y possible scenario you can write, and then you have all summer to figure out how to get yourself out of it".
