Freema Agyeman is a British actress who is known for playing Martha Jones in the BBC science fiction series Doctor Who (2007-2010), Alesha Phillips in crime procedural drama Law & Order: UK (2009-2011), Amanita Caplan in the Netflix science fiction drama Sense8 (2015-2018), and Dr. Helen Sharpe in the NBC medical procedural series New Amsterdam (2018-2022).