Calimachus, nicknamed "Cal" by Hercules, was a student at Cheiron's Academy. He objected to killing and swore an oath to do no harm as a healer. During the conflict between the Kaylans and Pathans, Calimachus served with the united armies of the Kaylans and Corinthians. He was shot by a Parthan arrow and, recognizing himself to be fatally wounded, Calimachus sacrificed himself as a diversion so that Hercules, Iolaus and Jason could escape from a dangerous situation.
- Calimachus was played by Ian Hughes