Here's some scoop on The Blacklist from Entertainment Weekly's Natalie Abrams' The Spoiler Room column, which was posted on 2/24/17.
Will we see Katarina Rostova back this season on The Blacklist? — Harlem
Yes! “In an unexpected way, she will come back and that’s going to be a really telling episode,” executive producer Jon Bokenkamp says. Could she actually be behind Red’s recent troubles? When I asked Bokenkamp whether Liz’s apparently dead mother would reappear in present day or just in flashback, he stayed coy. “I don’t think I should say that,” he says, “but she will be coming back.”
Link to the full article:Spoiler Room: Scoop on 'Arrow,' 'Agents of SHIELD,' 'Blacklist' and more