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SpoilerThirteen.png End of my tether, don't say that word!
Areas of this article contain spoilers about The Case of the Missing Blocks. Please proceed with caution.

Read at your own risk.

The Case of the Missing Blocks is the eleventh special episode of Learningblocks. It is the 127th episode overall in Numberblocks, and the 98th episode overall in Alphablocks.


Detective One is on the trail of Big Tum as he chomps his way through Alphaland. Yum, yum!

Characters (confirmed)

Words & Word Combinations

  • Big Yum
  • Big Tum
  • Bin (stealth word)
  • Bug (stealth word)
  • Bag (stealth word)
  • Beg (stealth word)
  • Bog (stealth word)
  • Big
  • Ten
  • Big Ten
  • Big Net
  • Not Big


  • This episode marks Big Tum's return since The Legend of Big Tum and More To Explore.
  • C, D, F, H, J, K, L, P, Q, R, S, V, W, X, Z, 3, 5, 7, 11, 12. 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, and 26 are absent in this episode.
  • This episode will be 10 minutes long, as confirmed by the CBeebies schedule.
  • The RadioTimes description mentions that this episode is about missing letters and numbers.
  • This is the second time word magic works with word combinations and not single words. The first one was Fox.
  • This episode uses the word “big” with a total of 6 times (single word and word pairs). This also means the word “big” was used the most in the Alphablocks series.
  • This is the third episode with a character who isn't their usual size. The first one was More To Explore and the second one was What If?.



@Numberblocks & Alphablocks - Mash-ups - The Case of the Missing Blocks