Mallingan

Professor Mallingan was a scientist who was investigating the icy planet Asharoth. He was in charge of his own scientist team and planned to use Asharoth to make the Earth a better place this would cause the total destruction of Asharoth.

When the Tenth Doctor was transported into his science labs, Professor Mallingan locked him up determined not to let anything ruin his plans for Asharoth but Professor Kate Cullan was taken in by the Doctor's warnings and released him causing the destruction of Professor Mallingan's labs. (DWAM: Cold War)