"Lines of Communication" is an episode from the fourth season of the science-fiction television series Babylon 5.
Franklin and Marcus attempt to persuade the Mars resistance to assist Sheridan in opposing President Clark. Delenn learns of the Drakh and of increasing caste tensions on Minbar.
- Sheridan is able to forge an alliance with the leaders of the Mars resistance.
- Shadow servants known as the Drakh have been attacking shipping.
- Conflict between the religious and warrior castes is growing on Minbar.