You're asking for actors and actresses who appeared in "Back 2007-2011." It's unclear what you mean by "Back." Is it a:
* Movie Title? If so, please tell us the full title.
* TV Show? Same as above, please give the full title.
* Specific Project? Perhaps it's a play, a music video, or something else. Please provide more details.
Once you clarify what "Back" refers to, I can help you find the cast list!