When the FBI intercepts stolen NSA software intended for Tal, Keaton uses the technology as an opportunity to go on the offensive and sends Shepherd undercover. Keaton must choose between catching Tal or saving the life of an innocent teenager.
With only one shot to take Dr. Lommers down for good, Lex carefully plans his next steps. Jana, Suzy, Teresa and Xander make their dangerous escape out of the cordon, but unexpected road blocks threaten to destroy their chance of making it home. Inside the cordon, Dr. Cannerts and Jake make a breakthrough discovery following a risky experimental treatment. Finally, with time running out, Lex is forced to make a decision that will change his life forever.
Keaton and his team are able to intervene and stop the assassination of a high-profile congresswoman; Shepherd interrogates the congresswoman, who had previously used Shepherd's treason conviction as a launching pad for her political career.
Annie and Auggie consider their future just as a connection from the past resurfaces and leads Annie on a race against time to prevent a terrorist attack on U.S. soil. Elsewhere, tension mounts between Calder and Joan as they wait to see who will become the new DCS and Arthur considers about a career in the private sector.
"Optics" is the best rated episode written by Chris Ord. It scored 8.292/10 based on 48 votes. It was directed by N/A. It aired on 3/4/2025 and is rated 0.3 points higher than their second-best episode, "Decoded".