Hyouka Episode 17: The Kudryavka Sequence
Episode 17 of 22 of Hyouka, aired August 12, 2012, 29 minutes. Available with English subtitles and dub where released.
Episode summary
Eru appears on a school radio show, asking all the other students to stand with the Classic Lit Club against the phantom thief. Hotaro confronts the person he believes to be Jumoji. Satoshi comes to terms with his expectations.