The Doctor, intending to land his TARDIS in the River Thames to flush out the Master, instead lands on a boat on the Thames, but outside he spots a glowing white figure, the Watcher, who directs the Doctor to continue on to Logopolis.
The Doctor, intending to land his TARDIS in the River Thames to flush out the Master, instead lands on a boat on the Thames, finding the Master's TARDIS has already disappeared. Outside, the Doctor spots a glowing white figure, the Watcher, who directs the Doctor to continue on to Logopolis.