2: "Doomsday""Doomsday" is the second part of the Season 2 finale, and Rose's last episode as a regular companion. Rose and the Doctor were flirty all through her time as his companion. Billie Piper and David Tennant had great chemistry and were very cute with each other. I'll give you the short plot summary of this complicated episode, though none of it really matters in the end because Daleks and Cybermen together!
Rose almost gets stuck in the parallel Universe, then comes back and declares she'll never leave the Doctor in spite of never seeing her mom or Mickey again. So there they are, saving the universe with stuff that involves big power levers and magnetic clamps, but we know that Rose and the Doctor will save the day and travel together foreve-
Ha, ha! Just kidding. Lucy snatches the football at the last minute, as Rose has to let go of her clamp in order to flip her lever back up (yeah, I know, bear with me) and almost dies until her dad who was dead but isn't dead in the other universe (almost there, kids) grabs her and takes her back to the other universe where her mom (who was dead in that universe but not in the one they just left), and Mickey (who replaced his dead self that he met in that universe) are waiting. Rose breaks down crying (in a beautiful performance by Billie Piper), and then she and the Doctor both lean against the wall and touch it. It's heartbreaking. It was all going to be okay, and then it wasn't.
Somehow the Doctor projects himself into her dimension for one final goodbye where she tells him she loves him, and he says "Rose Tyler..." and disappears before he can finish what he was going to say.
For the love of all that is holy, that was just mean.
1: "Journey's End"
"Journey's End" from Season 4 is Donna's last episode. This whole thing was really neat, because Torchwood and all the old companions (including Sarah Jane) come together to help the Doctor save the Universe, plus other Universes. It was super fun to watch, especially when, through a crazy thing involving Donna, the TARDIS, and a severed hand, a double of the Doctor is created, and Donna is given a Time Lord brain.
Hoo, buddy! Let me tell you... this situation was so bad that Torchwood, all companions, and the Doctor combined weren't enough. It took two Doctors and a Doctor Donna. There's a great moment when Doctor Donna solves a problem with human imagination combined with Time Lord brainpower, and it was so cool to watch, especially considering her character's journey. She started out a shallow, loud, brassy woman with more than a few self esteem issues. Throughout her journey with the Doctor, she came to respect herself, believe in herself and, more than anything, demonstrated that her kind heart was her most powerful asset. Then she becomes, basically, a superhero.
But wait, kids. There goes that football again!! The Time Lord brain will burn her out and kill her unless the Doctor removes all memories of him and her time with him. She can never remember him, or she will die. Donna cries and begs him not to do it. She says she was going to travel with him forever. And then my feels shriveled up and died.
It wasn't fair that the character who grew the most and in the most wonderful ways should have all that ripped from her. Martha got to come back. Mickey got to come back. Rose and Captain Jack and all the other companions got to come back. Donna will never ever be a companion again, and she loses all that growth and confidence. It broke my heart into a million pieces.
So there you have it, folks. Russell T. Davies. Feels kicker.