While Neal delves further into the mystery of the Codex, Peter takes on a classified espionage case with a fellow FBI agent: his ex-girlfriend.
Peter and Neal must infiltrate the criminal underworld of Little Odessa to uncover a dangerous smuggling ring.
Neal must go undercover as a butler to expose an imposter who aims to inherit a Manhattan family's fortune.
Peter send Neal undercover with a psychiatrist who may be manipulating her patients into committing robberies.
As Peter settles into a promoted position at the FBI, Neal has to pull off a brazen museum heist right underneath the FBI's nose.
Peter assigns Neal a new handler to investigate an online black market, but Neal's loyalties will be tested when he discovers the trail might lead to Mozzie.
With Peter in prison facing murder charges and every shred of evidence pointing to him for Senator Pratt's untimely death, Neal must strike a deal with the devil to help try and clear Peter's name.
In the Season 4 finale, the guys are almost able to retrieve the evidence box from the Empire State Building, but their efforts are impeded by Senator Pratt, who hired FBI agents to find the box first.
Peter and Neal investigate sculpture forgeries and also get closer to the truth about the evidence box.
Peter and Neal take different approaches to catch a criminal duo caught up in a whirlwind romance.
A forgery and money-laundering case has links to jazz and taxicabs.
Peter and Neal look into Senator Pratt's ties to corrupt cops who framed Neal's father. Their investigation also leads them to a real-estate developer running a kickback scheme.
In this mid-season premiere, Peter and Neal attempt to find the truth behind Neal's father's crime. In doing so, Neal must go undercover into the world of counterfeit whiskey to take down a high level member of the Irish Mob.
In this mid-season finale, Peter and Neal attend an FBI conference where someone is trying to steal high valued defense technology. They soon discover the thief's brazen plan to take something much more valuable from the FBI.
In this ramp up to the mid-season finale, Peter sends Neal undercover as a Wall Street stock trader. Neal discovers a White Collar boxing ring where traders fight for insider information.
The team look into museum heists in which rare artifacts are targeted.