The Blacklist's Tom Keen is not particularly pleased that Jolene/Lucy Brooks has interrupted his assignment, and he will be sure to tell her so during "Mako Tanida."

Tom's Brother Cast For 'Milton Bobbit', Alleged Sibling Has Ties To Jolene/Lucy Brooks On 'The Blacklist'?

The mystery of Tom's (Ryan Eggold) true identity has tormented fans throughout the series' freshman season, and it took Jolene/Lucy Brook's (Rachel Brosnahan) probing to get him to reveal that he hasn't been entirely honest with his wife. There is clearly more to his resume than a teaching certificate.

Despite the FBI's earlier investigation into his past and possible criminal activities, Tom managed to leave in the clear. Know that Jolene has revealed the truth, however, fans may start to see a different kind of Tom of the mild-mannered schoolteacher.

Did Red Tell The Truth About His Family On 'The Blacklist'? James Spader Explains Ramification's Of Deaths

"If indeed Tom is who he says he is and is some kind of assassin or con man, Tom's going to flip...you're going to see a side of Tom you've never seen before," Eggold teased in a Beyond the Blacklist featurette.

In the meantime, Red (James Spader) and Liz Keen (Megan Boone) will have to deal with an escaped criminal. One of Red's former associates, Mako Tanida (Hoon Lee), has slipped out of prison and Red will have to put an end to the con's search for revenge.

The Blacklist airs Mondays at 10 p.m. ET on NBC. Click the video below to see a preview of "Mako Tanida."

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The Blacklist, Nbc, Television