NCIS answers what exactly Edna is in the Tuesday, April 28, episode, and it’s over a decade of work of Kasie’s (Diona Reasonover), going back to her college days. But it’s now being used against her in the worst way possible, and it’s a good thing Sam (LL Cool J) is around to lend an ear. TV Insider spoke with Reasonover about diving into a different side of Kasie, her major decision at the end of the episode, and that hopeful moment as she left her lab. Warning: Spoilers for NCIS Season 23 Episode 18 ahead!

Edna is a program Kasie created that can help with fingerprint IDs. Now, not only has it been stolen, but the files were also deleted off the hard drive so she no longer has access to it. She was also about to make serious money selling it to a tech company. But it gets worse: Whoever has it uses it to create a fingerprint at a crime scene, framing Kasie for murder!

Originally published on tvinsider.com, part of the BLOX Digital Content Exchange.