Spoilers for 4x6.
In short:
Plot? Meh, almost entirely predictable. Jenny? OMG I love her!!!
Running commentary while unspoiled:
Come on, no-one is going to compare the situation with Utopia and Jack? Beside the hand.
"I love this bit." Aww Martha. You missed it.
"The feeling you get." "Like you swallowed a hamster." I love Martha's reaction, when you want to laugh but you shouldn't.
Ah! She has no mother. Created from a machine. I don't know why, the word Loom come to mind. So, are they in need of soldiers?
The machine is so good, it also creates clothes.
Miss daughter doesn't have the pacifism of daddy.
Martha! Oh Lady, daddy is going to be very cross, now.
"Her name is Martha, and she's not collateral damage, not for anyone! Have you got that, GI Jane?!" Donna is awesome, really, really awesome.
Martha, a doctor all the way, helping the people who kidnapped her. And winning the sympathy of her captors.
"I'm doctor Martha Jones. Who the hell are you." She faced the Toclafane and the Masters, it's not some human-fishes who will impressed her.
And the daughter is named by Donna. Hello Jenny.
"You can't extrapolate a relationship from a biological accident." "Child Support Agency can."
And the Hath are like the humans. Do they even know why they are fighting? Or do the do it because they don't know better, or don't know another way?
Keep smiling, Martha, keep smiling. No brusque moves.
And Martha will work with the Haths, and the two others with the humans. But only because they have no choice.
Hey, Doctor, every myth has a base on truth. Don't dismiss it like that.
No really, I bet the war begin on something stupid and small.
"Look up genocide. You'll see a picture of me there and the caption will read 'over my dead body'".
"I think I just start a war." No Martha, it's just the usual.
Okay, I like Jenny. And Donna does too, I think.
Here come the usual phone upgrade.
"Oh you are speechless, I'm loving this! You keep on, Jenny!" Yeah, she liked her too.
Stop hurting Jenny, Doctor.
Ohoh, I think the batteries just died. It's something the sonic screwdriver can't change.
Stop it Doctor! Thank you Donna, you show him.
She has two hearts. Like it or not, Doctor, she's a Time Lord too. I wonder if she has the surplus of lives too.
No seriously, I like Jenny.
Are you sure they have somthing adapted to your phone, Martha?
I like this Hath too. He needs a name.
Oh kiddo, you're not going to fall to this old kiss trope, do you? Yes, you did. Like Sheppard. But Jenny is more and more win. Please, don't kill her.
"I'd like to see you try that." Bwahahaha!! Oh Donna. The Doctor is thinking "I could, I totally could."
"Let's save your wiles for later. In case of emergency."
The mouse!
"Stay there." Doctor, when did someone ever obey this order? When did you ever obey the order of someone? Seriously, she come from you, she'll have some of your habits. And temper.
"Er, language!"
Didn't he say to her to stay there?
And Donna continue to be smarter than every one.
"Oh come off it. You're the most anomalous bloke I've ever met!"
"He saves planets, rescues civilisations, defeats terrible creatures. And runs a lot. Seriously, there's an outrageous amount of running involved." She has the better lines. Jenny has a very cute smile.
"What you were saying about running? *smile*"
Can someone listen Donna? I'm sure the numbers are important.
Yeah, Jenny! Good decision!
"No way. That's impossible. Not impossible. Just a bit unlikely! Brilliant!" Finally! Jenny is too cute, even her laugh is adorable! Please, seriously, don't kill her! Aww, how happy she is to not having killed the General.
I'm really scared for her.
Martha!
Peck? So he has a name. I must have miss it. Peck, don't die.
Nooo! Peck!
Ah! Donna want Jenny on the Tardis. If it's not a sign that Jenny won't survive :(
Stop being cute, Jenny! It'll hurt more!
Dad-shock!
"I'll tell you something Doctor, something I never told you before. I think you're wrong."
"Time to run again. Love the running."
Atlantis?
"That was close." " No fun otherwise!"
AH! Knew it, about the war.
And Donna save the day with her smart, before the Doctor.
It's only seven days? The war last seven days? But is it long days or short days? Damn, really seven days.
Martha! She's with them again! "I should've known you wouldn't stay away from the excitement!" Aww, look how happy she is to see Donna.
"I'm the Doctor, and I declare this war is over!"
The general didn't release his weapon. Please, don't try to shoot and have Jenny catch the bullet, please, please, please!
NOOOOOOO! Damnit, Jenny! It's just a bullet! Regenerate! He doesn't need more pain, writers! And me neither!
"She was too much like me."
Jenny's death hurt me more than Ross's. It's how good she was.
No Doctor, you can't shoot him. "I never would. Have you got that? I never would." Exactly.
Goodbye Jenny!
"I'm gonna travel with this man forever." Yeeeeah, you're not the first to think that, Donna.
Goodbye Martha!
Jenny? Jenny! She's alive!!! But she didn't change. A new race of Time Lords?
"What you gonna do, tell my dad?"
"Ohh, I've got the whole universe! Planets to save, civilisations to rescue, creatures to defeat. And an awful lot of running to do." Yeeeahhh Jenny! I love you, please come back anytime.