I.M. Foreman's Travelling Show

I.M. Foreman's One-Species Nongenetically Engineered Travelling Show is a complex space time event. It is similar, though not like a TARDIS.

Piloting and Travel
I.M. Foreman programmed the show's course by meditating and communicating telepathically with it.

It is a space time vessel but it has no extra-dimensional connections. It moves through space and time by retro-actively building a site and disguising itself before/during/as it moves there, this process takes years.

It is not designed for instantaneous (or even fast) travel, unlike a TARDIS. Unlike most TARDISes, the show can travel back into the dark time, and does so, it's occupants proof of it). (EDA: Interference: Book One,Interference: Book Two)

Effects the show has on space time
A by product of this is that it sometimes knocks dents in space time which lures other space time travellers to the site. Such as: the Faction Paradox, The Remote and the Third Doctor and Sarah Jane Smith to the planet Dust. Also the First Doctor and Susan to Earth, 76 Totter's Lane, 1963.