Her other major roles have included Auguste van Pels in A Small Light, Detective Inspector Kate Ashurst in Murder in Suburbia, Detective Inspector Helen Morton in DCI Banks, and PC Cheryl Hutchins in The Vice.

Her part in The Bill was the first of four long-term roles in which she played police officers: in The Vice she was a PC; in Murder in Suburbia and DCI Banks she was a Detective Inspector.

From 2004 to 2022, Catz starred in ITV's Doc Martin, in which she played primary school headmistress Louisa Ellingham (née Glasson).

She also appeared in a two-part episode of Single Handed, entitled The Stolen Child, as Dr Maggie Hunter.

Catz starred in the 2016 BBC One sitcom series I Want My Wife Back, playing the role of Bex.

[5] In 2018, she was the narrator on Britain's Biggest Warship, a documentary series about the aircraft carrier HMS Queen Elizabeth (R08).