Jimmy helps represent Mike when he claims to the DA that the gun in his recent altercation with Tuco gun did not belong to Tuco.
Jimmy gets fired (deliberately) and Kim decides that instead of taking a job offering with another company, leaves.
Jimmy approaches Kim and attempts to convince her to become a partner in their own law firm. But Kim reciprocates with a counter-offer – separate solo firms.
So starts the legal firm of Wexler McGill.