Do You Want To Live Forever? Finale Recap: Tracy Grimshaw creates a 'digital afterlife clone' and the pairs find out their new biological ages

The four Do You Want To Live Forever? pairs have made it to the end of their 12-week health challenge and it's time to find out just how much progress they've made.

In the final episode, their updated biological ages are revealed, but it turns out the health benefits aren't the only improvements made in their lives.

Stream every episode of Do You Want To Live Forever? on Channel 9 and 9Now.

So, did we unlock the secrets to living longer? Here are the biggest moments from the Finale of Do You Want To Live Forever?

Tracy creates an AI clone for after her death

Pondering our own mortality is confronting – but emerging technology is being used to make us immortal. Sort of.

In Los Angeles, Tracy visits StoryFile, a studio that can create a 'digital interactive clone' of her using artificial intelligence, which her loved ones will be able to talk to and interact with once she's gone.

READ MORE: A doctor explains how your pet dog could hold the secret to a long and healthy life

"From an emotional point of view, I struggle with it," Tracy explains.

"I thought about asking you to recreate my mother and I thought 'no, I just don't think I can go there.'"

After sitting in a room with 20 cameras and taking a short recording, an AI video clone of Tracy is created.

Watch the moment Tracy sees her AI self in the video below:

"I never imagined I'd be sitting across from my AI self having a spontaneous conversation," (the real) Tracy says.

Al Tracy is able to answer questions about her life and career, all with the same voice, tone and mannerisms as her no-AI self.

Despite finding the whole thing a bit strange, Tracy understands the purpose if this is something that appeals to you.

"It is great technology if you don't manage to live forever, at least you can stick around for the generations to come," she says.

READ MORE: Scientific futurist Dr. Catherine Ball predicts what our world could look like in 50 years

The pairs reveal how much closer they have become

The 12-week challenge has helped some of the participants turn around much more than their health.

For some, it's completely revamped their relationship too.

When Dr Nick visits Eliana and Enver at the end of the 12 weeks, Eliana reveals that their marriage was on the rocks before the show.

"If we had stayed on the path we were, we wouldn't be together down the track," she explains.

Enver's drinking in particular took a huge toll on their marriage and family.

"I'm going to be honest, we've slept in separate beds because when he's gotten that drunk I get upset, I go to sleep on the lounge.

"I was actually tired of always saying, for all these years, 'I'm disappointed in you, En, I'm disappointed".

EXCLUSIVE: Young mum Taylor reveals lengths she goes to to hide secret 'addiction'

Now that they have revamped their lifestyle, they are closer than ever.

"We encourage each other a lot more, we actually believe in each other a lot more. Now when he's getting undressed, it's like 'damn, look at that!'" she jokes, which catches Enver off-guard.

"I wouldn't say that on camera!" he replies.

But it's not just them that have found a deeper bond thanks to their changes.

Father and son Duncan and Tom explain that they're currently closer than they've ever been.

"The strength of our relationship and the way we talk to each other, the content of what we're talking about... having a real man-to-man relationship," Tom explains, getting emotional.

"I was going down a pretty crap path in terms of health and if I didn't address it, the opportunity to address it with you has been really really awesome. Couldn't have asked for anything better really," he tells his dad.

"I'm proud of you too," Duncan responds.

EXCLUSIVE: Ex-Olympian Duncan Armstrong on how his life changed after suffering a heart attack

The participants find out their new and improved biological ages

At the start of the 12 weeks, the four pairs were put through a series to health, fitness and sleep tests to determine their biological age – the age at which they are ageing physically.

For many, the results were devastating – but after 12 weeks of building healthy habits, it's time to see whether they've turned it around.

See more about their biological age results in the gallery below:

The great news is that all eight participants have earned back years on their life. Watch their results in the videos below:

Eliza and Liberty:

Tom and Duncan:

Luke and Taylor:

Eliana and Enver:

Everyone in the experiment had incredible results that made Dr Nick and Tracy really proud.

"I said to you all at the beginning that we were going to learn a lot from you and we really have," Tracy said. "You've been so brave, we certainly appreciate you."

Also in the episode, Dr Nick travelled to Japan to watch over 80-year-old's with remarkable fitness levels play football:

And Tracy caught up with bio hacker Nick Bell after his controversial experimental surgeries:

Stream every episode of Do You Want To Live Forever? on Channel 9 and 9Now.

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