Official photos from the January 20 episode.

#16 “The Alchemist”

From NBC: “Red informs the team that ‘The Alchemist’ (guest star Ryan O’Nan) — a man who relies upon science to transform a person’s DNA — has been contracted to protect a well-known mob informant and his wife. As the team goes undercover to catch him, Liz finds herself on the hunt for an unlikely couple. Meanwhile, Liz and Tom find themselves at another bump in their relationship and Ressler debates whether or not he should give his ex-girlfriend his blessing.”

#15 Red and the Team Begin their Hunt for the Next Person on the Blacklist

#14 What’s on that Paper?

#13 Ressler Deals with a Personal Matter

#12 Ryan O’Nan as Eric Trettel and David Vadim as Pytor Madrczyk

#11 Pytor Madrczyk

#10 Meera Goes Undercover

#9 Have Agents Keen and Malick Nabbed the Suspect?

#8 Pytor is Caught by Ressler

#7 Tom Keen Socializes with a Beer in Hand

#6 Keen, Ressler and the FBI

#5 The Police and FBI Close in on Their Target

#4 Keen Urges Caution

#3 Either Keen’s Telling Everyone to Wait or She’s Showing the Suspect She’s Weapon-Free

#2 Keen Spots Eric Trettel — aka The Alchemist

#1 The Alchemist Looks Angry — What Will He Do Now?

Jeff Dodge

Staff Writer, BuddyTV

Jeff Dodge, a graduate of Western Washington University, has been a TV news editor for many years and has had the chance to interview multiple reality show stars, including Randy Jackson, Nick Cannon, Heidi Klum, Mel B and John Cena.