SPOILER ALERT: Do not read if you haven't seen Age of Ultron yet.

I did what every other red blooded geek planned on doing this weekend... see Avengers - Age of Ultron. It had everything you would expect from a Joss Whedon movie and the amount of cameo appearances was impressive …

One of the coolest things I’ve seen from PBS PR team in a while. I challenged a few online friends to name the characters referenced in the clip. Sadly, most could only get two or three.