When Calls the Heart is airing the third episode (entitled "Dancing Teens") of its 12th season on Sunday, Jan. 26 at 9 p.m.

In 1900's San Francisco, a white woman is murdered in Chinatown and the suspect is a Chinese man. The murder causes a social shock and the public calls for Chinatown to be outlawed. Chinese medicine ...

Every Doctor, every companion, every enemy. Discover the Whoniverse. Only on BBC iPlayer.