The first series of David Tennant's new British comedy drama, There She Goes, concludes tonight on BBC Four at 10pm.

The five part series centres on a severely learning disabled nine year-old girl Rosie (Miley Locke), her dad Simon (David Tennant), mum Emily (Jessica Hynes) and brother Ben (Edan Hayhurst).All the stories and characters are drawn from the real life experience of writer Shaun Pye, whose daughter was born in 2006 with an extremely rare and to date undiagnosed chromosomal disorder. Each episode shines a light on day to day life with Rosie - unique experiences from simply trying to take her to the park to trying to explain that every day isn’t her birthday. A second timeline set in 2006 shows the effect having a severely disabled child had on the family unit, how it threatened to disintegrate but ultimately brought them even closer.

Episode Five: Ben
Rosie (Miley Locke) is incredibly excited. Grandad - aka Gandalf (Nigel Planer) - is finally coming because there’s going to be a birthday with lots of presents - albeit Ben’s (Edan Hayhurst) birthday presents.

A birthday meal out at a restaurant descends into chaos, but luckily Grandma (Serena Evans) has bought Rosie some presents to distract her. Everyone in the restaurant assumes it’s Rosie’s birthday, which in turn leads to yet more carnage. The only person unaffected by all this is Ben - she’s just Rosie, after all.

In the earlier timeline, Simon (David Tennant) and Emily (Jessica Hynes) are effectively leading separate lives, until Rosie’s first laugh finally helps them move a little closer.

Catch up with the series so far on BBC iPlayer here