Grace and Justin talk about how time travel works inconsistently in Back to the Future. Contents[show] Cast AppearingEdit Grace Justin George Other characters mentionedEdit SettingEdit Salty Crackers Comics First Mention OfEdit TranscriptEdit Categories: Comic pages without thumbnails Justin Grace Appearances EGS:NP Female Justin Appearances EGS:NP Grace Justin Appearances EGS:NP George Appearances EGS:NP Normal George Appearances EGS:NP EGS:NP Comic Transcripts Grace Appearances EGS:NP Fully Human Grace Appearances EGS:NP Justin Appearances EGS:NP Normal Justin Appearances EGS:NP Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.