After eight seasons, countless corpses, pop-culture jokes and pineapple sightings, USA Network’s “Psych” finds the phony medium and his best pal parting ways.

Maybe.

In “The Break-Up,” written and directed by series creator Steve Franks, Shawn (James Roday) isn’t growing up — he just knows he has to do something different with his life. And that something involves his girlfriend, Juliet (Maggie Lawson).

Gus (Dule Hill), meanwhile, has landed his dream job, which comes with a generously stocked cafeteria, an annual retreat to Belize, a beautiful co-worker who re-reads “Harry Potter” once a year to stay grounded and a company car whose GPS can be set to “tacos.”

Still, there’s one last murder for the guys to solve.

But it just doesn’t meet Shawn’s high standards.

“This isn’t nearly as grisly as I was hoping for,” he complains to detectives. “Are there any other crime scenes in the area?”

We all have to make do with the dead bodies that fall at our feet.

But spunky Detective Betsy Brannigan’s (Mira Sorvino) powers of deduction make Shawn look like Capt. Obvious’ dim sidekick Ensign Duh.

Shawn doesn’t help the case by suggesting one clue will lead to “the lost city of Atlanta.”

For those at home, spotting the real killer will be easy.

Befitting this comedy murder mystery show, the reveal isn’t as important as the ride, and that’s capped by one of the goofiest car chases on any show with both Shawn and Gus driving one vehicle.

Our killer wonders, “Who finds a murder weapon and goes to a Wendy’s Drive-Thru?”

Hey, the guys were hungry. Cut them some slack.

Just so coincidentally, Shawn’s dad, Henry (Corbin Bernsen), is nearby teaching a bunch of lippy college students forensic science and drags them into the field to help his son.

Getting Shawn and Gus to face up to the changes in their relationship — now that’s the hard work.

It’s always been about the bromance.

“He’s my best friend in the universe. How are you supposed to break up with your best friend?” Shawn wonders. (If “Scrubs” had just a few more corpses, it would have been “Psych.”)

Shawn’s parting video message for Detective Lassiter (Timothy Omundson) — derisively nicknamed “Lassie” — is worth the episode alone, if only for Lassiter’s inspired reaction to it.

There are shout-outs to Matt Damon, and later, a complaint that his film “We Bought a Zoo” lied. There’s also one almost-out-of-­nowhere celebrity cameo, yet it’s perfectly in character with this nutty show that unabashedly loved its fans.

“Psych” might be ending, but the adventures will never stop.

After the finale, stick around for the live special “Psych After Pshow” with the stars at 10:07 p.m.