She has an extensive resumé of work on British television, which stretches back to the mid-1980s. Her career began in earnest, however, in the 1990s with roles on Waiting for God, with Graham Crowden; EastEnders; Verity Lambert's Jonathan Creek with Stuart Milligan; The Bill, and Red Dwarf. In the 21st century, she's worked on, to highlight just a few, Footballers' Wives; Steven Moffat's Jekyll; and Jean Marsh's Upstairs, Downstairs, directed by Euros Lyn. Jemma also played herself in The Five(ish) Doctors Reboot.