According to the official blog, episode 6 of Girls und Panzer
was announced to be postponed due to various circumstances and will be aired on November 19th. The special program "Episode 5.5: I'll introduce!
" will be aired on November 12th instead. As a result, the airing of the final episode could be delayed more than one week. The airing date of the final episode will be announced before episode 11.
Source: Girls und Panzer official blog