Nicola Walker stars as Hannah in 'perfect' ending to 'The Split'

Nicola Walker's character breaks down in emotional scenes on BBC show The Split

Nicola Walker on Annika and Morgan

Nicola Walker says a third Unforgotten is not guaranteed - and she was \

Unforgotten's Nicola Walker reveals intense moment that left her weeping on set

Nicola Walker promises that BBC Two's Collateral \