1x24 - Sabrina's Secret Life

Salem finds out that an evil warlock named Toc-Toc has been released from 75 years of suspeneded animation, being blamed for a crime Salem committed, and is out for revenge on him. Being the coward he is, he asks Sabrina to disguise him as a teenager and let him hide out at school. Unfortunately, Toc-Toc also changes into a teen and tracks Salem down. Salem has to own up to his mistakes and confront Toc-Toc.