Episode 3 of ‘Hard Knocks’ gave fans a deeper, more candid look at the Buffalo Bills' training camp, and James Cook signed ...

In anticipation of HBO's "Hard Knocks" with the Buffalo Bills, here's a look at the most memorable moments from the sports reality documentary series.

The Bills are this year's subject of the training camp edition of HBO's "Hard Knocks," the network's long-running documentary series that profiles the behind-the-scenes goings on of an NFL team.