The Slyther of Shoreditch (short story)

While engaged in his machinations during the Shoreditch Incident, the Doctor meets an old Time Lord "acquaintance"; the man warns of a counter-strike by the Daleks, part of a trans-temporal campaign against Gallifrey called Pa-Jass Vortan. When the Time Lord also warns that the Daleks are using a bio-mechanised Slyther to track something important to the war, the Doctor becomes concerned for the Hand of Omega device he is hiding. Enlisting the Time Lord's unwilling aid in tracking down the Slyther, the Doctor borrows a hearse and some clothes from the undertaker looking after the Hand's casket; he and the Time Lord then lure the Slyther to an electricity substation, where they manage to electrocute the creature. As the Time Lord departs with the Slyther's charred remains, he warns the Doctor of the oncoming storm of the Time War.