'Hard Knocks' 2019 Schedule: When Is Episode 4, How to Watch, Live Stream HBO Series

The third episode of Hard Knocks was arguably the best of the series so far.

From an intriguing insight into what the Oakland Raiders knew about Antonio Brown's helmet controversy, to lifting the lid on the relationship between the wide receiver and head coach Jon Gruden, Episode 3 had plenty of talking points.

As if that wasn't enough, viewers also got treated to a classic NFL feel-good story, as Darren Walker revealed his struggles with substance abuse.

If you can't wait for the next installment of this season of Hard Knocks, here's everything you need to know about the penultimate episode of the series.

When is the next 'Hard Knocks' episode?

The fourth episode of the new season of Hard Knocks will air at 10 p.m. ET on Tuesday, August 27, on HBO.

The season finale will air on September 3. The Raiders open their NFL campaign six days later against the Denver Broncos.

Where can I watch 'Hard Knocks'?

Hard Knocks will be available on HBO, HBO on Demand, HBO NOW, HBO GO and HBO partner streaming platforms.

Jon Gruden, Oakland Raiders
Jon Gruden, head coach of the Oakland Raiders, watches from the sidelines during the first half of the NFL preseason game against the Arizona Cardinals at State Farm Stadium on August 15 in Glendale, Arizona. Christian Petersen/Getty

What did we learn from Episode 3?

A lot. First and foremost that the Raiders knew about the fiasco surrounding Antonio Brown's helmet way before the story became public. The seven-time Pro Bowler threatened to quit football earlier this month if the NFL insisted on forcing him to wear a different helmet from the one he has used for 10 years.

The fact Brown has used the same helmet—a Schutt Air Advantage—for a decade is the problem in itself. The model has been discontinued and NFL and NFLPA regulations required that all players wear helmets manufactured within a 10-year window.

Brown filed a grievance with the NFL to wear his old helmet and lost, before finding a newer version of his preferred headgear. When he was told the newer model did not meet certain requirements, the wide receiver filed a second grievance with the league.

"Thanks for supporting me, coach." Jon Gruden building his bond with @AB84 💯#HardKnocks pic.twitter.com/sXDKc3lLn6

— NFL (@NFL) August 21, 2019

While the helmet saga has kept Brown more occupied than football, Episode 3 offered an illuminating insight into what coach Jon Gruden thinks of it all.

"I don't know what the story—what the f*****g story is around here," the Raiders head coach said.

"He's tried everything, really. I give the guy credit for standing up for what he believes in. Everybody else does it in this country."

While the relationship between Brown and Gruden seems to be blossoming, general manager Mike Mayock is becoming exasperated with the 31-year-old's protracted leave from training camp.

Episode 3 ended with Mayock telling the media it was "time for him [Brown] to be all-in or all-out". If it sounds ominous is because it is.

Why has HBO chosen the Raiders?

Because of NFL regulations, teams are exempt from consideration if they have played in the postseason in the past two years or have been the focus of the series in the previous decade. Teams who have a first-year coach are also not considered.

That left HBO with just five franchises to choose from—the Oakland Raiders, New York Giants, San Francisco 49ers, Detroit Lions and the Washington Redskins.

So far, viewers can have few complaints about HBO picking the Raiders.