Trains Under the Sea

[Ordovician]

I'm not sure exactly what sort of Doctor Who story could be made out of the following, but clearly something could...

philadelphia.cbslocal.com/2013/02/19/locomotives-at-the-bottom-of-the-ocean-have-historian-puzzled/

[da professor]

Spatial anomaly steals trains from tracks and dumps them where they were found. The Doctor and his companions have to stop the loss of a third train with a full complement of passengers, possibly including a historically significant person who those responsible for the anomaly were trying to kidnap.