episode 3, "Discovery," begins with Rusty Sabich (Jake Gyllenhaal) still staring down at the text that reads, "YOU WERE THERE. I SAW YOU". Rusty goes outside to call the number and pleads to know who it is.

No-one responds. Barbara Sabich (Ruth Negga) follows him outside. He shows her the message and admits he was there that night.

But not to kill her. She begins to cry and goes inside. By the pool he stares at his phone and wonders what to do.

The episode then cuts to Rusty tussling with Carolyn Polhemus (Renate Reinsve) as she pleads, "Rusty, this is not you." He then exclaims, "You don’t know me and you don’t know what’s in me," before hitting her with a fire poker. He then screams, "Wake up Raymond," as Raymond Horgan (Bill Camp) wakes up from his dream.

With plenty of things still left to be discovered, what else happens in ’s third episode, "Discovery"? Take a look below to find out...

Who wants to meet Rusty? The person texting Rusty demands to meet him that afternoon. Rusty shows Raymond the text, saying it could be a trick or a reporter. Raymond again scolds Rusty for not telling him that he was at Carolyn’s the night of the murder.

Rusty says he went there after to work to try and win Carolyn back, but failed. Raymond wants Rusty to hand the phone over to the police. Rusty wants to find out who it is and what this is about.

Raymond asks if Rusty has an alibi for the night of the murder. But he’s clearly apprehensive, insisting they don’t know the time .