He spotted the familiar figure in black, walking down the street, headed roughly in his direction.
When he did he switched off the external monitors and slipped out of the TARDIS and leaned against the corner of his time machine and
waited. When the Master was within reach he reached out, grabbed a handful of cloak and hauled him inside, with a surprising amount of strength and determination.
"Hello," he said, geninally, while he shoved the Master into a wall and yanked the doors closed behind them.