Professor Stahlman was the founder and head scientist of the Inferno Project. He was obsessed with completing the project quickly and fought anyone who might delay it, including Sir Keith Gold, Greg Sutton and the Third Doctor. He was infected with Stahlman's ooze and mutated into a Primord. He was killed when the Doctor and Sutton sprayed him with a fire extinguisher. (DW: Inferno)

In the novelization, Stahlman's first name is Eric.

v • e Aliens and Enemies of Season 7 Spearhead from Space Nestene Consciousness  • Autons (Channing) The Silurians Silurians (Okdel  • Morka  • K'to)  • Silurian pet The Ambassadors of Death Alien Ambassadors  • Carrington  • James Quinlan  • Bruno Taltalian  • Reegan Inferno Primords  • Republican Security Forces (Lethbridge-Stewart  • Elizabeth Shaw  • Benton)  • Stahlman/Director Stahlman