* "Piers Morgan Tonight": This is the name of the show.
* "2011": This is the year.
* "2011-08-15": This appears to be a date, but the context isn't clear. Are you looking for episodes that aired on this specific date, or something else?
To help me understand your request, please clarify:
* What exactly are you looking for? Specific episode release dates, a list of episodes from that date, something else?
* Is "2011-08-15" a specific date you're interested in, or just part of a broader range of dates?
Once I have this information, I can provide you with the information you need.