Cheevah

From Tardis Wiki, the free Doctor Who reference

Cheevah was the only person to stand up to Anzor at the Time Lord Academy. Anzor sealed Cheevah in a block of crystal and dropped him from the academy bell tower into the school yard as a punishment. The Sixth Doctor later told Peri that Anzor had forced the rest of the children to laugh at this under threat of a shock from his galvaniser. (AUDIO: Mission to Magnus)