doctor who (slight spoilers for last week's UK episode)
Three days since I saw it and I'm still freaking out about the last episode of Doctor Who. Such a great cliffhanger, although I always worry the Russel T. Davies will trip up on the second part.
My theory: The faithful companion that will get its everlasting death is the TARDIS itself. In future seasons, the Doctor will travel through time and space by hopping on Dalek Caan's back and yelling "Emergency Temporal Shift!"