Call the Midwife viewers are threatening to "riot" if either Sister Julienne or Dr Turner fail to survive the train crash that left them fighting for their lives on Sunday's episode.
Fans were shocked when the characters - played by Jenny Agutter, 69, and Stephen McCann, 59, respectively - were seen lying injured and unconscious as the credits rolled.
They had been returning from a conference when the train they were travelling on collided with another, after the driver suffered what appeared to be a brain haemorrhage.
