The Doctor invited Toni T. back to the TARDIS where they took the alien and dropped him off on his home planet. All the while, the Doctor spoke continuously about the TARDIS and all it's features. He wanted to familiarize Toni T. with it as quickly as possible. Little did he know that she knew more of the TARDIS and all the bells and whistles than even he. However, remaining in disguise, she merely smiled and nodded pretending to be fascinated.
Many missions and adventures passed as Toni T. silently set up everything she needed to throw her ultimate plan in action while the Doctor was not looking. A master of technology, luckily the TARDIS was so broken down and grotesque, the tiny equipment she put in key locations blended in as if it had always been there.
They battled Daleks, Yetis, and Ice Warriors together, which was actually quite fun. Toni T. was beginning to find that having a partner around could be useful and even slightly delightful. There is nothing quite like defeating Daleks to really make someone's day. It's the simple things in life, Toni T. mused. Her equipment had already been established exactly as intended, for several adventures now, yet for some strange reason she delayed on it...
One late evening, after a long drawn out run in with Cybermen, the Doctor and Toni T. practically fell into the TARDIS exhausted. Toni T. sat on the floor, leaning against the wall in the console room, rubbing her face with a hand wearily. The Doctor shut the door and set the coordinates to leave then proceeded to plop down beside Toni T.
"Well, I certainly never expected it to take that long. Jolly good work back there though. Who knew you could turn an information capsule into a weapon like that?" the Doctor laughed partially amused and somewhat impressed.
"Oh Doctor, you should know by now that anything can be made into a weapon!" Toni T. smiled lightly with a small laugh.
"What? Even these?" the Doctor played picking up Toni T.'s hand and waved it about, "Watch out you fiends! I have got a very dangerous weapon here! You step back or else I will use it!"
Toni T. laughed heartily in her worn out state as the Doctor began to vigorously shake her arm making silly threats about hurting one with her arm. He set it back down on her lap after a turn, with her still smiling about it. As they settled down and the peacefulness of their collective weariness set in, they both said nothing.
"Toni, you never told me you were the Rani," the Doctor finally spoke.
"What?" she exclaimed, sitting up on edge, jerking out of relaxed position.
"Well it's obvious now isn't? No need to lie. You have a double pulse. The only female Timelord who is scheming and plotting enough to infiltrate my operations without a word of their true intentions would have to be you. The Rani. Nice regeneration, I quite like it. What number is this?" the Doctor explained and requested extremely nonchalant.
"Why I am not the-" the Rani began continuing her acting before just throwing it away altogether, "Oh, forget it. Yes, indeed it is me! And you played directly in my hand just as I had predicted! You are such a fool Doctor!" she added with an evil laugh.
The Rani pulled a dagger from her tall black boots instantaneously and put it to the Doctor's throat.
"Oh Rani, is there a need for all this dramatics? Can we continue after a nap?" the Doctor sighed.
"Ha ha ha ha ha!" the Rani sneered, then tacked on quietly, "No."
The Rani, keeping the jagged dagger pointed at him, rose from the floor and directed the Doctor to a post where she bound him with no resistance.