Amanda Abbington is an English actress. She started her acting career in the 1990s, making her debut in the British series The Bill. She later had notable roles in the TV shows Plotlands, Magic with Everything, and Picking up the Pieces. In the 2000s, she had notable performances in various shows. This includes Always and Everyone, 20 Things to Do Before You’re 30, Bernard’s Watch, and The Robinsons. From 2007 to 2008, she became known for playing Siobhan Casey in the BBC comedy series After You’ve Gone. In the 2010s, she became known for playing Louise Munroe in Case Histories, Miss Mardle in Mr Selfridge, and Mary Morstan in Sherlock.