Viewers will see Kevin and Freya for the first time on Wednesday, May 11 when they arrive at The Mill in the hope of securing trainee positions at the health centre.
Towards the end of the week, Julia decides that both Kevin and Freya will be hired - adding two new regulars to the Doctors mix.
In the video below, Simon and Lu discuss their characters, and we also get a glimpse behind the scenes as established cast and crew give an insight into life at Doctors.
> Read our full spoiler for Kevin and Freya's first episode
> Read the rest of our Doctors spoilers and news