You can lock evil away, but on The Blacklist, it always finds a way to slither back out.

'The Blacklist' Season 3: Is Liz's Mother Alive Or Dead? THIS Episode Will Dive Back Into The Mystery

Red, Liz, Dembe and the rest of the Post Office team spent the first half of the season squirming under Mr. Solomon's thumb. Even now that the sadistic henchman is locked away, he will still find a way to worm is way back into the story during episode 17.

The upcoming hour will fittingly be titled "Mr. Solomon," according to Spoiler TV.

'The Blacklist' Season 3: Will Liz Keep Her Baby? 'Drexel' Plot Revealed

The episode does not yet have an airdate, but it will join the schedule in the wake of "Lady Ambrosia" (Feb. 11), "Drexel" (Feb. 18), and "The Caretaker" (Feb. 25).

Following the events of "Alistair Pitt," next Thursdays episode will see Tom and Gina continue their plan as a missing child puts Liz and Co. on the trail of the next Blacklister (see video below).

"After a missing child that has been presumed dead turns up alive, Red (James Spader) and Liz (Megan Boone) work with the taskforce to search for a dangerous woman who may be kidnapping children," NBC teased. "Meanwhile, Tom (Ryan Eggold) faces shocking consequences after his plan to help Liz goes awry."

Find out more when The Blacklist airs Thursdays at 10 p.m. ET on NBC.