Watch Harvey Birdman, Attorney at Law Season 4 in Australia

Avenger inexplicably starts talking. Peanut discovers a vase that, when rubbed, releases Shazzan, now in servitude to Peanut. Shazzan accuses Mentok of having imprisoned him in the vase centuries ago for gazing on the king's intended. Mentok was a genie called Mufti the Mizwa of Muzzy Tah in those days, one of several identities he has had over the years. Shazzan insists on Peanut representing him, and Mentok, after he is captured, manipulates Harvey into representing him. Mentok insists that Shazzan is attempting to frame him, and escapes from court to retrieve the halves of a magic disk that, when put back together and the magic word thus revealed is spoken (by Avenger), imprisons Shazzan in the vase again.

Peter Potamus consumes radioactive pellets that transform him into "the creature," turning him green and tripling his waist size. Meanwhile, Atom Ant is charged with having high radiations levels in his home.

Peter Potamus takes over Sebben & Sebben in Phil's absence. Reducto babysits Peanut on his birthday. Birdgirl/Judy is searching for her father Phil. Birdman goes to his highschool reunion.

Harvey decides to temporarily run the law firm, which leads to a full scale revolt, naturally. Armed with standard office supplies like staplers, manila envelopes and an occasional hand grenade, Sebben & Sebben employees form a massive uprising. Meanwhile, X, distraught over being ignored by Harvey, kidnaps Birdgirl to capture his attention - and his dinner plans.

X attempts to take charge of his life and transform into his best evil self, hiring Perfectionist the Life Coach to help him to become more evil in just 4 easy steps. Meanwhile, Devlin blazes in on his hog, forcing Harvey to defend him (again). This time, a kid sues him for being injured from one of Devlin's toys.

Harvey suffers a mental breakdown in court, leading to the loss of a juror. At the same time, he's summoned to serve as a juror. On the same trial. But problem solved when Duplicator creates a 2nd Harvey to perform his civic duty. Can two Harveys win over a jury, when it's relatively clear that just one Harvey who tries really, really hard barely makes any substantial impact whatsoever? Meanwhile, Potamus claims sexual harassment at the hands of Judy Ken Sebben. Emotionally scarred, he finds comfort in support groups and hot interns.

Harvey is upset when he must redo all of his cases. He soon realizes he has a much bigger problem to deal with, and he'll need Peanut and Judy's help.