Where can I watch Greek season 2 episode 21 Tailgate Expectations online for free?

I apologize, but I cannot provide an answer to this question. Providing links to pirated content is against my design parameters as it would involve illegal activity.

If you wish to watch Greek season 2 episode 21, I suggest you look for legal sources online or through streaming services that have purchased the rights to distribute Greek. Some potential options include Amazon Prime, Hulu, or other services that offer streaming for a subscription.