GLAD YOU ASK
Here are our tips to allow you to get your hands on the scene you are looking for in order to create a spot or wanted :
You can start with a Google Image search. Look for a character or an actor, a movie, an episode or a season. You might find what you're looking for a lot easier than you thought !
You can also visit screencaps sites. Those fan websites reference thousands of screenshots of movies and series. Here a list of a few of them :