Possible Clues:

• Unattributed element in score for temporary players
• Queen in Texas waving bye bye maybe
• Film crowd
• "Cast of thousands" types
• British sitcom starring Ricky Gervais as Andy Millman
• Spear carrier strikes first in the film
• Set crowd, maybe
• Some performing in 9 days that's restricted by time
• Spear carrier smiles first for the picture
• Ones who are never billed?