The Android Invasion
Corporal Adams was a UNIT soldier stationed at Devesham under Colonel Faraday. The Kraals made an android duplicate of him. (The Android Invasion)
Behind the scenes
In the original script for The Android Invasion, Corporal Adams was a regular army soldier called Private Richard Adams. Max Faulkner had previously appeared as a member of UNIT in The Ambassadors of Death, where he was credited as “UNIT Soldier”. It is possible that these two characters are one and the same.