The Answer is In the Boiler Room

With a flick of his sonic screwdriver, the Doctor turns on the lights to the room that he has ushered his companions into to escape a grizzly fate at the tooth and claws of the ravenous Sharkticon guards.

 

Mikaela: 'Where are we?'

 

Doctor: 'We are in the boiler room. Well, boiler rooms are usually on the bottom floor of a building, which I suppose at some time this was! Never-the-less, the boiler room is where we are!'

 

Mikaela: 'And how are we gonna save five million lives while we're locked inside a boiler room?'

 

Doctor: 'Much the same way as we disposed of the guards. Almost every building has built within it a fire safety system. No one wants to lose their property to a fire and the Quintessons are no different. Especially considering they built their Quantum Chronological Interdimensional Transporter here! We are going to dilute the Sharkticon treat into the reservoir here! (pointing to the massive reservoir behind him). We pour the liquid treat into the reservoir which we can access via the pump atop the reservoir... wow, I am saying the word 'reservoir' far too much! Anyways, the treat within the, er... reservoir system will then be ready for us to use when we need it!'

 

Sam: 'So it will spray everywhere when we set it off? The Sharkticons will fight each other to eat the treat!'

 

Doctor: 'Exactly. They can't help it. Even diluted at a ratio of one to one hundred thousand, the Sharkticons can't resist it. It's how the Quintessons control them. The Alligatacons are slightly more clever, but there are not enough of them present to matter. The Sharkticons will be worked to a feeding frenzy with the treat spraying everywhere. They will fight our battle for us!'

Done