A married Long Island couple was killed when a punk in an SUV t-boned their car and ran off — leaving behind the carnage, including even his own injured passenger, officials said Sunday.

Hit-run hellion Patrick Poillon was ultimately nabbed overnight Saturday into Sunday and charged with leaving the scene of an accident resulting in death for his role in the fatal collision, cops said.

Poillon, 24, was driving through his hometown of Mastic Beach, heading south down Huguenot Drive, just before 10:15 p.m. Saturday when his 2006 Ford Explorer struck a 2004 Subaru going eastbound on Forest Road West, according to the Suffolk County Police Department.

Both the Subaru’s driver, William Molnar, 50, and his wife, 41-year-old Jean Molnar, were killed at the scene of the ugly crash, said the Office of the Suffolk County Medical Examiner.

Poillon escaped from the crunched wreckage of his Explorer and took off running, leaving behind the two people killed in the collision and the 22-year-old man who had been riding shotgun in his own car, authorities said.

While they were too late to save the Molnars, who also lived in Mastic Beach, first responders pulled Poillon’s passenger from the twisted metal and rushed him into a police helicopter bound for Stony Brook University Hospital.

That man, whose identity was not immediately released, was treated for non-life-threatening injuries, officials said.

The law caught up to Poillon overnight.

Poillon wore a blank expression and a t-shirt bearing the logo of ’90s ska-punk band Sublime as he was led Sunday from the Seventh Precinct station house in Shirley, his shoulder-length blond hair flowing in the breeze.

At his arraignment at First District Court in Central Islip, Poillon was ordered held on $5 million bond or $1 million cash bail, public records show.

As of late Sunday, the lofty sum had not been posted.

Sunday’s court appearance was hardly Poillon’s first trip through the Suffolk court system.

In June 2017, Poillon was hauled in on a criminal-trespassing charge, which was still being adjudicated as of last month, records show.

And just days after that incident, Poillon was hit with a slew of vehicular charges, including operating a motor vehicle with suspended registration.

Records show that in that case he skipped court and was deemed a scofflaw.

A lawyer listed as representing Poillon did not respond to a request for comment Sunday.