Person of Interest/Tear Jerker

• Reese, sitting in the dark and watching Jessica's wedding video as it dawns on him that not only did he fail to come for her when she needed him, even after promising to come get her with the words, "wait for me," that he couldn't say to her before, but it was because he couldn't say those words all those years ago that, even though they were still deeply in love, she gave up on him and married an abusive husband who later killed her.
• Finch telling Reese about how he had to fake his death (Or at least, the death of one of his various aliases) so that if the government ever decided that he needed to be killed in order to keep the secret of the machine, they wouldn't go after his fiancee as well. He sits in the park outside her house from time to time, keeping at least 100 yards away so she doesn't notice him, just so he can see her.