Cura te ipsum is a Latin exhortation, translated as "cure yourself," or colloquially, "physician, heal thyself." It reminds physicians to take care of themselves first, before caring for patients. It was said by Jesus to his disciple Luke (Luke 4:23), who was himself a healer or physician.
This episode highlights the dilemma Dr. Tillman faces: does someone bound by the Hippocratic Oath to "do no harm" really have a good reason to kill someone? At the same time, as Reese persuades her not to kill Benton, he confronts the possibility that there is an alternative to the killing he's been trained to do.
This episode also highlights the metamorphosis of Reese from a killer to a "healer". In the final scene with Benton, Reese has to decide how best to remove Benton from society, hence the image of the gun between his two hands: one is his killing hand, the other his healing hand. Reese relates to Benton's urge to hurt people and both express a desire to change, but who is being honest as well as the final outcome are left to the discretion of the viewer.
According to Jonah Nolan, the ending of the episode is deliberately ambiguous, leaving each viewer to decide whether Reese killed Benton or not.
When Finch meets with Carter in the Brownstone, he is wearing the glasses we normally see him wearing in only in flashback scenes.
In the opening scene in the ER, Tillman hands the orderly 2 files indicating they are for a man named Davidosn and a child. The orderly then hands her back both of the files a moment later claiming that they are Harold's.
While Dr. Tillman is speaking with Harold in the ER, the curtain behind her is open. When Harold triggers the camera it is closed.
When Dr. Tillman puts Benton into the wheelchair, we can see someone's hand holding the wheelchair for her (around 30' in the episode).
"And maybe you could change. And maybe so could I. 'Cause the truth is, people don't really change, do they?" (Reese)
"Maybe it's up to me to do what the good people can't. Or maybe there are no good people. Maybe there are only good decisions." (Reese)
"Which do you think I'll regret more: Letting you live or letting you die? Andrew, help me make a good decision." (Reese)
"Long days, stressful job. You're finally off the clock and you just want some peace but some clueless idiot keeps bothering you." (girl responds) "Oh, I wasn't talking about you, but in case you haven't noticed I'm beating them off with a stick here: Whatever you do do not offer to buy me another drink" (Benton)