The BBC comedy ‘The Other One‘ follows two half-sisters, both named Catherine ‘Cat’ Walcott, played by Ellie White and Lauren Socha, who discover each other at their father’s funeral. Siobhan Finneran plays their mother, Tess.
Main cast
- Catherine ‘Cat’ Walcott (the nice one)Ellie White1-3Main
- Catherine ‘Cat’ Walcott (the naughty one)Lauren Socha1-3Main
- Tess WalcottSiobhan Finneran1-3Main
- MarilynRebecca Front1-3Main
Supporting cast
- Aunt DawnHannah Job1-3Supp
- ColinAmit Shah1-3Supp
- Pete WalcottIan Mercer1-2Supp
- MickTrieve Blackwood-Cambridge1-3Supp
- HannahAmy Gledhill2-3Supp
- Mr. KnowlesReece Buttery1-3Supp
Guest & voice
- VickySeraphina Beh2Guest
- SharonStephanie Fayerman1Guest
- Dr. NewittRicky Grover2Guest
- AnnaMegan Beech3Guest
- Father DougColin Hoult1Guest
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About this cast
The Other One is a BBC One sitcom created by Holly Walsh and Pippa Brown. It centres on two very different women, both named Catherine Walcott, who discover they are half-sisters after their father’s funeral, leading to much awkwardness and humour as they navigate their new relationship.
FAQs
Who plays Catherine Walcott (the nice one) in The Other One?
Ellie White plays the nice, sensible Catherine Walcott, nicknamed ‘Cat’, throughout all three series.
Who plays Catherine Walcott (the naughty one) in The Other One?
Lauren Socha plays the more rebellious, outgoing Catherine Walcott, also nicknamed ‘Cat’, in all three series.
How many series of The Other One are there?
The Other One ran for three series on BBC One from 2017 to 2020, with a total of 14 episodes.
Is The Other One a sitcom?
Yes, it is a BBC sitcom created by Holly Walsh and Pippa Brown, focusing on the relationship between two half-sisters who were kept secret from each other.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026