It’s a big night for Adult Swim on Sunday, as “Aqua Teen Hunger Force” celebrates its 100th episode and “The Boondocks” returns after a three-year hiatus. Adult Swim — Cartoon Network’s late-night lineup — is chock full of sick, twisted, hilarious animated shows, and these are two of its best.

“The Boondocks” (11:30 p.m. Sunday, Cartoon Network), a Peabody Award-winning series based on Aaron McGruder’s racially provocative (and now-defunct) comic strip, focuses on 10-year-old Huey Freeman, a sullen, cynical, budding black activist; his younger brother Riley, a thug in training; and their grandfather, a self-described civil rights hero, and their life as a black family in “post-racial” America. The series doesn’t pull any punches when it comes to racial issues, and as social satire, it can bite deep.

Tonight’s episode is in the form of a Werner Herzog documentary chronicling the family during the 2008 presidential campaign. Huey, for one, isn’t buying Obama’s message of hope and change; his reaction to the historic election? “Meh.”

Here’s a clip:

And after that, you can turn off your brain for “Aqua Teen Hunger Force” (midnight Sunday, Cartoon Network), a surreal series that defies description. It’s the one that you come across while flipping channels late and night and you go, “Wait, is that a talking milkshake?” (Yes. Yes it is.) There’s never really a plot, just a lot of smack-talking among a household of talking fast-food items and horribly unfortunate encounters with their neighbor, Carl. It’s the kind of show that makes no sense whatsoever when you’re sober. But say you come home late from a bar after having a few, you want to stay up a bit so you don’t get the bed-spins . . . .  it suddenly becomes hugely entertaining. The fact that it’s lasted 100 episodes is a tribute to drunken 20-somethings (and, ahem, 30-somethings) everywhere.

Here’s a clip of the insanity: