Orange is the New Black season 4 trailer: Things get heavy for the Litchfield ladies

'Pain's always there, but suffering is a choice'

There's a change in the air.

We all knew something big was coming when a busload of new inmates appeared at the close of season 3, arriving at the now for-profit Litchfield prison to be packed in like sardines.

Now, the new trailer for season 4 teases ever-rising tensions in the overcrowded facility. With the new blood, comes the new security forces; bringing the threat of an all-out war breaking on multiple fronts.

Whether between prisoners and guards, or between prisoners and prisoners; rest assured what's being teased here is a dark new turn for the prison-set comedy-drama.

One character who certainly needs to watch her back is Piper (Taylor Schilling); her panty-selling business fuelled power trip, which saw her ship former lover Stella off to Max, has certainly made her a fair few enemies. What's all that burying talk about, again?

There's at least some confirmation that Alex Vause (Laura Prepon) survived her confrontation with Aydin in the prison greenhouse; though we don't see her, her voice is heard asking Red (Katie Mulgrew); "Can you keep a secret?"

However, there's no sign of whether Nicky Nichols (Natasha Lyonne) will return from Max, or if we'll ever see John Bennett (Matt McGorry) return to the mother and child he abandoned.

All 13 episodes will launch Friday, June 17 on Netflix.