There never was a VG: Part Two, see official comment from BBC: "The episode that aired on the 30 December was in fact episode 16, not episode 17 Part 1. Therefore there is no episode 17, nor episode 18. Season 13 of QI is only licensed for episodes 1-16. The title of S13/17 (VG Part 1) was ingested on our guide by error. We sincerely apologise for this. However, you have in fact recorded all the episodes for S13 E (1-16)."