When the War Doctor appears, Clara remarks, "I think there's three of them," to which Kate responds, "There's a precedent for that," in reference to The Three Doctors.
Gdy pojawia się Doktor wojny, Clara mówi do Kate Myślę, że jest ich trzech (I think there's three of them), na co Kate odpowiada To nie precedens (There's a precedent for that) w nawiązaniu do odcinka The Three Doctors.