I agree with Episode 2 of Runaways. I just signed up with Hulu to watch it. While searching Hulu, I found an old show I used to love.
Before Rory from Legends of Tomorrow lost all his hair and Lincoln from Prison Break was incarcerated, There was John, the Amnesiac who knew everything.
John Doe - this was blast from past. The main character was a human google except he knew nothing at all about himself. It was a procedural but the mythology about his condition was fascinating. he found out a mysterious corporation was involved in how he came to be the way he was. Another interesting side plot was his attempts to learn more about his tastes and preferences and his visual condition(he saw everything in black and white except for rare people and objects.
The cast was great as well. besides Purcell, there was William Forsythe and Sprague Grayden as his friends and Jayne Brook and John Marshall Jones as the cops.
Other reason why this show stuck with me was it may have been the first time I dealt with a unresolved cliffhanger. Since I recently just had to deal with the Dark Matter cliffhanger, I thought it was intriguing to revisit a previous cliffhanger.