IMDB is the only reason my wife has a smartphone. This made her head explode ~eP
X-Ray for Movies & TV (available on Kindle Fire and Wii U devices)
While watching an Amazon Instant Video title, tap the screen or pause the video to launch X-Ray feature which accesses IMDB then lets you see who the actors in the current scene are. You then tap the screen again (or start Play) to continue the video.
IMDB plans to “add X-Ray to more television content each week.”
IMDB’s pages say that to see if a title supports X-Ray, you should look for the “Includes X-Ray” icon on the title’s Amazon Instant Video detail page. (I’m not sure it always shows up — maybe they’re behind on that, or I’m just missing it.)