Dr. Shreek from "Goosebumps" by Tim Fish

I gave Tim a scan of the UK cover artwork and a screencap from the TV show to work on this.

Dr. Shreek is from the 13th Goosebumps book, "Piano Lessons Can Be Murder." He's the head of a music school and has a bizarre obsession with finding excellent hands to work with. When he begins educating young Jerry on how to play the piano, Jerry is slowly unnerved by Shreek's behavior and mixed with the haunting going on in his home connected to the piano in his house Jerry eventually decides to quit. This causes Shreek to have a complete psychotic breakdown and chases after Jerry, determined not to lose his "beautiful hands." It's then revealed that Shreek is actually a sophisticated robot... and Jerry learns who the REAL obsessive is.

I love that Tim was able to include Shreek's hands in this.