When N tries to ban D from the band, the others get the fab four back together to prove that you can do much more with four! This episode introduces end blends like '-st' and '-nd' and the words band, bus, bust, win, wind, tent, ram, ramp, mist, lost, gulp and help.
- C, F, J, K, Q, V, X, Y, and Z are absent in this episode.
- G, H, I, L, M, P, R, S, and U only say their sound in this episode.
- N's singing voice sounds like D's.
- The fours in this episode are different from the fours in Numberblocks.
- As of June 2019, this is the only episode of Alphablocks that shares its name with an episode of Numberblocks.
- This is the first episode of Series 4.
- It makes sense because this episode’s about four-letter words.