The program is anchored by award-winning journalists Elizabeth Vargas and David Muir.
Director Tom Green felt that Alisha could have read one way but Thomas brought a "much more complex character" and added more "vulnerability" to Alisha.
It’s stressful but also a lovely position to be in".
As long as Alisha’s the centre of everyone’s world, then life is sweet.
Let's have a look: Arriving in series four as one of the new class, Nathan landed the part after impressing in an audition for a much smaller role.
Since playing the telekinetic teen, Nathan has only been in a couple of TV projects, but one of them was the 2014 alongside Brian Blessed.