Kathleen: When Clara managed to get out "Mercy," I recalled instantly an actual Dalek begging for mercy, from River Song in Doctor Who Season 5 Episode 13 ("The Big Bang").

In “Into the Dalek,” a Dalek fleet surrounds a lone rebel ship, and only the Doctor can help them now… With the Doctor facing his greatest enemy, he needs Clara by his side.

Clara and Missy partnered up to free The Doctor from Skaro on Doctor Who Season 9 Episode 2. Did the Time Lord show young Davros mercy? Check out our review to find out.

But "Dalek" was nearly a different beast indeed. Showrunner Russell T Davies wasn't sure exactly how dark Doctor Who could go, considering it was going out for a family audience.

So much happens in this episode and we haven’t even got to Clara and her teaching narrative. In her day job, she flirts naturally and meets new co-worker Danny Pink (Samuel Anderson) and tries ...

At end of the "Into the Dalek," though, Clara fleshes this out: "You asked me if you were a good man, and the answer is 'I don't know,' but I think you try to be and I think that's probably the ...

Nothing like a Dalek saying: "We have waited long for this ultimate destiny. Now the Daleks are the masters of Earth" to really freak humanity out.