Asked how he coped with losing his family, Bain said: "... thinking back over a lot of the circumstances that I found myself in I don't know how I got through them.
"I can only thank my upbringing, my family, my Mum and Dad [who] helped us with our education, with our upbringing again, with university studies, and helped us become the people we are."
He said he'd had a lot of love and respect for his father, Robin, - who David Bain's defence counsel claimed must have killed his family - and struggled to come to terms with them accusing him [Robin] of the murders.
But the evidence was clear that he [Robin] was responsible, he said.
Mr Bain has been working as an engineer at a west Auckland workshop for the past two years. He said it was no easy feat finding work.
He would apply for jobs, and employers would phone him just to have a chat with David Bain, but they wouldn't actually offer him a job, he said.
The TV3 programme contained interviews with his workmates, who described him as humorous, and "one of the guys".
David Bain has also developed a love for horse riding, and often rides along Auckland's west coast.