"Make no bones about it (all puns intended), Mark Sheppard knows how to keep a secret. Not only did he keep his mouth shut for months about his unexpected return on SUPERNATURAL, he steadfastly dodged questions during his interview about how much longer his character Crowley will be featured on SUPERNATURAL and what Crowley is really up to. In fact, when first asked what he could say about Crowley’s return, Mark laughingly admitted, 'Everything – but then I’d have to kill you!'"
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