Carnival Phantasm Episode 12: Badump Date Super Plan: Answer
Episode 12 of 12 of Carnival Phantasm, aired December 31, 2011, 15 minutes. Available with English subtitles and dub where released.
Episode summary
A continuation of Episode 4 "Badump! Date Super Plan". Shiki and Shirou attempt to simultaneously date all of their heroines at once in a single day with disastrous results. The Ahnenerbe holds a party to celebrate the end of the series, and it includes various characters that haven't appeared in the series from Fate/Zero, Kara no Kyōkai, and Notes. The final segment features Ayaka Sajou calling Ahnenerbe as a lead in to Fate/Prototype.