For a three-act plot analysis, put on your screenwriter’s hat. Moviemakers know the formula well: at the end of Act One, the main character is drawn in completely to a conflict. During Act Two, she is farthest away from her goals. At the end of Act Three, the story is resolved.
Act I
The Telemachiad. This part consists first three episodes, which focus on Stephen Dedalus.
Act II
The Wanderings of Ulysses. This part is comprised of Episodes 4 through 15, which focus on the daily goings-on of Leopold Bloom.
Act III
The Homecoming. This part is made up of the last three episodes of the book, and consists of Bloom escorting Stephen back to his home, and getting ready for bed after Stephen leaves. The last episode is comprised of Molly's thoughts before she goes to bed.