The Beast - 1 ª Season

Maverick FBI agent Charles Barker reluctantly takes on rookie agent Ellis Dove and goes undercover to find out about an illegal weapons ring and bring it down. Ellis is approached by senior agents to prove that Charles is a dirty cop but he refuses.

Ellis is re-approached to gain his co-operation in bringing down Barker but he refuses again even though they provide him with evidence. Meanwhile he tries to assist Barker in breaking out drugs baron Jimmy Casserly from police custody so that they can do a drugs trade with him in order to gain better evidence and re-arrest him but they find that an ex-police lieutenant has a person vendetta against Casserly and goes out of his way to hinder Barker. Elsewhere, Ellis finally gets to go on a date with Rose.

Charles goes undercover to bring down Romanian Roman Petrescu who is involved in human trafficking but who pleads diplomatic immunity anytime the FBI get close. Meanwhile, Ellis becomes involved with one of Petrescu's prostitutes, Nadia, and tries to locate her son who was sold by Petrescu previously. Elsewhere, Ray continues to pressure Ellis into bringing Charles down.

Ellis's brother William rolls into town after spending 7 years in jail and promptly robs his house of electrical equipment. Meanwhile, jeweler Susan Redman's son Matt is infected with a deadly virus and she is ordered to take $10 million dollars of jewels to a drop-off at Millenium Park. She follows their instructions but Baker only allows her to take half the jewels so that they hold to their deal of providing the antidote for her son. But the jewel thieves have Susan's house watched and attack her when Baker leaves and take the remaining jewels. Baker and Ellis trace Matt's infection to a lab and find the culprits which leads to the recovery of the jewels and Matt's antidote being found.

Barker and Dove are asked to protect nuclear physicist May Nan Nhung after five FBI agents are gunned down trying to protect her and are asked to get her to a NNSA hearing where she is to testify.