Staircase Infinities
 Staircase Infinities is a studio EP by British progressive rock band Porcupine Tree first released in December 1994 as a limited 2000-copy 10 vinyl by Lazy Eye and reissued on CD by Blueprint in the UK in October 1995. It contains outtakes from the Up The Downstair sessions.Originally Staircase Infinities was intended to be released on a double album version of Up The Downstair but was not completed in time.