The Blacklist's Liz Keen is turning to Tom's family for answers about his identity, and Peter Scanavino will be portraying the mysterious husband's older brother.

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

Tom (Ryan Eggold) has been a suspicious character ever since Liz (Megan Boone) unearthed his alleged multiple passports and hidden gun. Although the FBI previously cleared the seemingly innocuous schoolteacher of any criminal wrongdoing, Red (James Spader) has continued to warn Liz that her husband is not to be trusted.

As Jolene/Lucy Brooks (Rachel Brosnanhan) revealed during "The Judge," Red was correct in his suspicions. Tom is definitely not the man he claims to be, and his "brother" won't check out either, according to TV Guide

Prepare To See Tom Keen 'Like You've Never Seen Before,' Who Is Ryan Eggold's Character Working For On 'The Blacklist'?

TV Guide claims the alleged sibling may be much more familiar with the name "Lucy Brooks" than his little brother, and the site states that fans will get to find out for themselves in the March 31 episode.

Titled "Milton Bobbit," the series' 18th episode will hopefully shed some light on both Tom and Jolene/Lucy Brooks.

In the meantime, Eggold promises that viewers will soon see a very different side of his character, and it is doubtful that it will lead to domestic bliss.

"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.

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