Glow is the sixth episode of Alphablocks Season 1, and the 6th overall.

O, U, N, and OW is the main character, and F, G, L, N, O, S, U, W, FF, and OW appear in the episode.

At first, C is seen cracking cracks to her sound, then she meets her brother K, who is kicking the ball to his sound while R counts the keep-ups. C thought K is copying her. C's cracks ruin K's keep-ups. C and K decide a contest. K does it on E and Y. A large cage falls onto everyone except E, G, and Y. As K takes the key to the locked door, there is no keyhole. So, C and K join together to make the CK sound.

This episode teaches short O words, the UN word family and digraph OW.