Original sentence: The AP Films marionette series have often been the target of satire, but the best-known Thunderbirds send-up was the sketch entitled "Superthunderstingcar", performed by British comedians Peter Cook and Dudley Moore in the mid-1960s for their BBC TV series Not Only... But Also
Edited sentence: The AP Films marionette series have often been the target of satire, but the best-known (and arguably the best) Thunderbirds send-up was the sketch entitled "Superthunderstingcar", performed by British comedians Peter Cook and Dudley Moore in the mid-1960s for their BBC TV series Not Only... But Also