Speaking to interviewer Mark Williams-Thomas, Pistorius repeats the familiar story about mistaking Ms. Steenkamp for an intruder.
He tells of lying down to sleep beside Reeva in a humid room where the air conditioning unit was broken, and turning on the fan to keep cool.
He asked Reeva to close the doors and switch off the television, and they both fell asleep.
Then, the unimaginable happened.
Half asleep, Pistorius realised that Reeva had forgotten to close the doors. He got up to close them, leaving Reeva in bed and his prosthetic legs behind.
Then, Pistorius heard a noise coming from the bathroom.
“This instant fear comes over me that there’s somebody in the house,” he says of his first thought.
“Somebody’s was actually in the process of breaking in. And my first thing was thinking that I need to grab my firearm. If this person’s already got into the house, it’s a matter of seconds before they’re in the bedroom.”
He claims he whispered to Reeva, who he believed was still in bed, to "call the police and get down on the floor."
Knowing he couldn't make a run for it without his legs, his only thought was to get between the intruder and Reeva.
"At least I'm between them and her," he recalls thinking.
"I'm starting to shake, sweating. I start screaming, 'Get out of my house. Get the fuck out of my house.' At that moment, I hear the toilet door slam."
"I don't have time to get my legs back on, these people are in the house already. If I hesitate, they could use the gun on either of us."
He shouted again for Reeva to call the police.
"I'm petrified at this point. I don't have the balance to align the firearm."
Then, he noticed that the bathroom window was open, confirming his fears of a break-in.
"I can't go back to Reeva and expose her and expose myself. All I know if there's somebody in my house, and all of a sudden I hear a noise at the toilet.
"Before I knew that I had fired, I had fired four shots."
Not really knowing what was happening, Pistorius made the decision to go back and check on Reeva.