I was watching the time meddler when the Doctor said that the monks Tardis was a mark 4, don't know if that should be in roman numerals, so I put into a search engine and this was about the first result. This article should cover mark as it relates to the Tardis and possibly K-9. http://tardis.wikia.com/wiki/K9_Mark_IVHackwrench ☎ 18:06, July 15, 2015 (UTC)
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