Due to Samuel L. Jackson's busy schedule, his scenes were filmed a month before the rest of the episode was shot. It took him only a day.
When Maggie meets Samuel L. Jackson, she says he played Morpheus in The Matrix (1999), and he corrects her saying it was Laurence Fishburne. The scene is based on the fact that Jackson is often mistaken for Fishburne (and vice versa) in real life. In fact, during a live interview with Samuel L. Jackson someone did just what Maggie does.