I hope we will find out exactly what put Harold in the wheelchair (which I believe is connected to Nathan’s death).
Also, I would like to know how he was able to connect John Reese with Jessica, who we assume was an Irrelevant Number he was trying to save from her abusive husband Peter. If Finch didn’t invent the Machine until AFTER the Towers fell on September 11, 2001, and if Reese and Jessica were only together for 4 days in September 2001, how did Finch and The Machine know to look for John Reese and be at the hospital in New Rochelle when he arrived there in February 2011, almost 10 years after Reese and Jessica broke up??????