The first pics of Doctor Who's new assistant have been released, showing her dressed up as her character.
Freema Agyeman will play Martha Jones, and she's pictured in a tight, red leather jacket, with a spiky hairdo.
Doctor Who boss and writer Russell T Davies also gave away some clues about the third series.
He said: "We were delighted and honoured by the second series' success, and we can promise new thrills, new laughs and some terrifying new aliens."
He added: "The Doctor and Martha are destined to meet William Shakespeare, blood sucking alien Plasmavores, The Judoon - a clan of galactic stormtroopers - and a sinister intelligence at work in 1930s New York."
Freema, 27, takes over from Billie Piper in the third new series, which will be shown on TV in 2007.
The Doctor will next be back on the screen at Christmas this year, in an episode called The Runaway Bride.