While travelling through the Time Vortex, the TARDIS is suddenly caught in a time corridor that the Fifth Doctor finds familiar. After the TARDIS is forced to land, Peri asks where they've ended up. The Doctor tells her they're on Skaro, the home planet of the Daleks. However, when they step out of the TARDIS, instead of encountering the Daleks, they encounter the Cybermen.
It is later shown that the Fifth Doctor, realising that the Cybermen have wiped the Daleks from existence, quickly attempted to escape with Peri. Ultimately, this perversion of history was negated when the Twelfth Doctor and Rassilon restore the timeline. (COMIC: Supremacy of the Cybermen)