Much like last season, when the “Nathan” character started imposing himself more and more on the rehearsals, Fielder mostly casts aside his co-pilots and actors in “Washington” and plants himself uncomfortably in the frame.

After the delirious high of Nathan Fielder imagining the ideal pilot by casting himself as Sully Sullenberger in reenacted scenes from his memoir, there was perhaps nowhere for The Rehearsal to go bu…