a while ago, I talked about episodes where no one dies. I now think I should have explained it better.
Episodes where no one dies whatsoever:
"The Edge of Destruction" (By the simple virtue of having no guest characters)
"The Savages" (Ironic considering that it takes place during a war)
"The Mind Robber"
"Four to Doomsday" (Again, ironic considering the title)
"The Empty Child/The Doctor Dances" (Unless you count some people who MAY have died in the London Blitz, off-screen )
"The Doctor, the Widow, and the Wardrobe"
"In the Forest of the Night"
Most minisodes and parodies.
More if you go only by human deaths.
Now here are stories where no one dies arguably/based on technicalities:
"Fury from the Deep" (The weed)
"Terminus" (At least not on-screen)
"Fear Her" (Chloe's father, although he was already dead)
"The Eleventh Hour" (Except for Dr. Ramsden and some other doctors, who were killed off-screen)
"The Beast Below" (Hawthorne said some people got eaten by the whale, not during the episode as far as we know, but still)
"The Curse of the Black Spot" (At least not on-screen)
"Night Terrors" (Except for (presumably) the dolls)
Tell me if I missed any.