Alan

Played by: Derek Jacobi
Last Tango In Halifax. Alan (Derek Jacobi). Image credit: Red Production Company.

Mild-mannered, good-natured and honest, nothing can diminish the joy and delight Alan feels at having met Celia once more.

Alan is sociable and out-going, enjoys a drink with his mates and holidays with daughter Gillian and grandson Raff despite ongoing problems with his heart.

Alan's someone who often unwittingly gets caught up in adventures - and Celia is his perfect partner-in-crime. He is and always has been in love with her, ever since he was sixteen years old.

Celia

Played by: Anne Reid
Last Tango In Halifax. Celia (Anne Reid). Image credit: Red Production Company.

Celia can be sharp-tongued and anxious, but she's also clever, loyal, and has a fabulous sense of humour.

Celia also has a tendency to lash out when feeling defensive, which often makes her seem tougher than she really is.

She can be a terrible snob, but meeting Alan has opened up whole new worlds for her and brought her out of her insular shell. He also brings out her cheeky sense of adventure and enables her to start living in the moment for the first time in decades.

Caroline

Played by: Sarah Lancashire
Last Tango In Halifax. Caroline (Sarah Lancashire). Image credit: Red Production Company.

Hardworking, successful Caroline feels like her life is falling apart.

Her career as a headmistress is going from strength to strength, but her marriage is collapsing - husband John recently left her to move in with his lover, but now he's back and wants to try again.

Caroline herself has got herself caught up in a complex emotional relationship with fellow teacher Kate, but is unable to acknowledge the depth of her feelings. Is Caroline still in love with John? Or is she just in denial about her sexuality? Caroline's depressed, confused and feels that the future lacks hope. At least Celia's happiness at falling in love with Alan is one weight off her mind.

Gillian

Played by: Nicola Walker
Last Tango In Halifax. Gillian (Nicola Walker). Image credit: Red Production Company.

Gillian's life is a chaotic mess, and she gets through each day more by luck than good judgement.

Her abusive husband Eddie died in a farming incident several years ago, and Gillian has struggled to keep the farm going ever since. Gillian's always been a worry to her father Alan, and she's still got a wild side - drinks too much, shags the wrong people. She's recently been getting off with much younger Paul Jatri, a relationship which will come back to haunt her.

Gillian's delighted that her dad is in love, but tries not to think about what she and son Raff will do if Alan decides to move out - he's been such a support in her life.