This Is How It Ends – In the series finale, Jason’s surgery to get rid of Ian is about to begin, but years of taking his blackout drug render him immune to normal anesthesia. Under the influence of stronger medicine, Jason flashes back to his childhood—and Ian’s origins. Meanwhile, Jordan and Lena take separate paths to uncover Jason’s secret.
You Made Me Do This – Jason has an MRI that reveals a brain tumor after collapsing in front of Dr. Young, but his plan with Ruben to get rid of Ian during the ensuing surgery hits a snag when Lena may be on to them—and Ian isn’t too keen on the idea either.
But I’m Allergic to Cats – Ruben’s kill drug is near completion, but he isn’t sure if he should use it on Jason or Ian; Jason’s son is taken out of harm’s way.
Mine – Jason learns he has a son, but his attempt to have a relationship with him is thwarted by Olivia, who believes it’s too dangerous. Meanwhile, Ruben and Lena begin to question Jason’s practices.
Circadian Rhythms – An operation on Jordan’s son is made even riskier by Jason’s ingesting of the unfinished kill drug, which makes Ian’s appearances more random than usual.
The Cookie Jar – When a surgery’s complications force it to continue after 8:25pm, Jason chances taking Ruben’s still-unfinished kill drug to hold Ian off long enough to finish the surgery. The surgery is a success, but the drug doesn’t last as long as planned and both Lena and Olivia suffer as a result.
Six Feet Deep – Ruben hires a gang to mug Ian to obtain a sample of his spinal fluid, which he believes can be used for a drug to eliminate him, but the plan hits a snag when Jason is blackmailed by the thugs to get rid of one of their rivals.
I Can’t Keep Your Secret – Jason’s secret is in jeopardy after he receives an anonymous text message threatening to expose him. Meanwhile, Olivia takes Cole to a place that reminds him of his father; and Jordan learns more about Jason’s past.
A Stand-In – Ian has a new love interest whom he met in D.I.D. therapy, but Jason worries about her health, and when he tries to help her it might mean the end of Ian’s romance. Meanwhile, Dr. Jordan tells Dr. Young that someone altered her daughter’s chart; and Lena pursues a new relationship.
Me Likey – Jason makes a deal with Ian that he can see Olivia, but only on the condition that Ian pose as Jason at a formal affair to honor Dr. Young, though the evening is nearly ruined by Ian’s behavior, which pushes Lena away and puts Young’s daughter in danger. Later, Olivia meets Ian in a hotel room, but it’s a rendezvous he may soon regret.