Use sites such as The Internet Movie Database if the actors or characters of a scene are known. Plug the actor or character name into the search field at imdb.com. Click on the actor or character name link, and a list of movies is then available that narrows the search.
Enter the location into a Web search site such as Google.com if the setting of a scene is unusual. For example, type "movies with a Mars setting," and sites appear that describe movies based on Mars.
Search for dialogue from the scene. Type "life is like a box of chocolates" in the search site field and references to the movie "Forrest Gump" will appear.
Look for other details of a scene. Input "scene with Indiana Jones and many snakes" in the search field. References will appear for "Raiders of the Lost Ark."