The BEST episodes directed by Desmond Mccarthy

#1 - Dawn of the Gods
Blake's 7 - Season 3 - Episode 4
Orac steers Liberator off course to investigate a black hole and the Thaarn reach out to Cally from her childhood stories. Liberator lands on the artificial planet Crador.

#2 - Volcano
Blake's 7 - Season 3 - Episode 3
The crew search for a new home base on the planet Obsidian, whose volcanic outbursts -- and a nuclear device buried in the planet's core by its inhabitants -- protect the planet from being overtaken. Servalan employs an elaborate plan to take control of the Liberator.