i'm in this mood because of scorn, i'm in a mood for total war - locked;
Days after the world has gone back to normal, most of humanity back at their daily routines with no memory of events, Ianto Jones has not forgotten or forgiven. He's hardly slowed down since - there are people to retcon, official explanations to be given, aliens to deal with, and he has family to take care of. Dafydd and Fred both get retconned; Dafydd ends up convinced that he's lost his job with the Prime Minister happening to be a nutter, and that he drank himself silly before returning to his family the next day, taking Fred along with him. Ianto leaves the rest of the list to Moira to take care of, arranges for the necessary made-up stories, and handwrites the press release regarding the suicide of Harry Saxon himself.
When he stops long enough to think, he finds a confusing jumble of memories, which ultimately result in him sitting down for a chat over coffee with Martha Jones. After a few hours with her, his next move becomes abundantly clear. Things come together seamlessly, with a little help. Ianto goes to the infirmary, first, to both check on Jack and to make sure he won't get in the way. He's sleeping, and Ianto doesn't disturb him, just asks Owen casually enough to let him know if the Captain wakes up. Martha, his co-conspirator if not collaborator, does her part next, calling the Doctor up and coaxing him to the conference room - she has her goodbyes to say, after all, she explains.
He gathers a pair of guards who won't be inclined to ask questions, a set of Weevil restraints, a PINpoint, and Jack's TARDIS key, still attached to its bit of twine. Retrieving the Master from the cells takes a matter of minutes. They handcuff him without a word and march him to the storage bay where the TARDIS is being housed. Ianto purposefully turns the key in the lock and swings the door open into the strange and foreign interior of the ship. He gestures the guards in with the Time Lord first, then closes the door and locks it firmly behind.
The lock will serve as little barrier to slow anyone down - but no one will know what's happening until it's too late, anyway.