Meanwhile, Bruce (David Mazouz) digs deeper into Wayne Enterprises' corrupt board and Nygma (Cory Michael Smith) makes an unexpected move.
Feeling The Ogre may be coming for Lee (Morena Baccarin), Gordon (Ben McKenzie) unsuccessfully tries to convince her to leave town.
While inspecting a manor, they save a butler, Jacob Skolimski (Daniel Davis) from being hanged and discover the corpse of Constance Van Groot.
Cobblepot (Robin Lord Taylor) is forced to have dinner with Maroni (David Zayas) and his mother Gertrude (Carol Kane).
While looking for files, Nygma (Cory Michael Smith) discover Kringle (Chelsea Spack) has bruises in her arm from Dougherty (Zachary Spicer).
The episode received a rating of 77% with an average score of 6.7 out of 10 on the review aggregator Rotten Tomatoes, with the site's consensus stating: "Gotham finds the right mix of creepy and fun, even when the plot of 'Under the Knife' spreads the characters a bit too thin.
Club's Kyle Fowle gave the episode a "C" grade and wrote, "Now, through two episodes post-break, and with only two more to go, Gotham appears to be falling back into the pattern that’s defined most of this season, which involves convoluted storylines that stretch the characters (and audience’s patience) thin and rely far too much on exposition to move the plot along.