Mitchell (Let's Kill Hitler)
From Tardis Wiki, the free Doctor Who reference
One teacher taught Amelia Pond and Mels history at a Leadworth primary school, in the 1990s.
She once taught about the sinking of the Titanic in 1912, and asked Mels why it occurred. She answered that the Titanic sank because the Doctor didn't save it, and called her teacher stupid for not knowing about him. Mels was sent to the headteacher's office for this comment. (TV: Let's Kill Hitler)
