Jo Grant (Dead on Arrival)

A version of Jo Grant existed on an alternate Earth that her N-Space counterpart was once accidentally sent to.

This version of Jo died after the arrival of her counterpart caused her life force to disappear. The N-Space Jo, unable to interact with this world, watched as this reality's Third Doctor left flowers beside her open coffin in a church, leading N-Space Jo to believe that she herself had died, and that she had become a ghost. (COMIC: Dead on Arrival)