The Doctor nods his head in approval for the direction Helena is thinking. Good. Clara isn't around, he needs someone to think.

"So, two options then: either we're brought here for entertainment or we're placed here to test this specific ship and crew. Either way, he thinks he's in charge. But there's one big difference."

They are. They have all the control they need.

"Whether for entertainment for for testing, we're the most importing thing here. All of us. The entire ship. So, what happens if we were taken out of the picture? Do you think that would get his attention?"

Because if there's one thing the Doctor is good at, it's making noise.