Adric was a young native of the planet Alzarius, which exists in the parallel universe of E-Space. A companion of the Fourth and Fifth Doctors, he had a brilliant mathematical mind and sported a star-shaped badge (blue enamel with gold backing) for mathematical excellence, Adric is also very well aware of his own intelligence.
But his travels come to an end when he tries to stop a Cyberman-controlled freighter from crashing into the Planet Earth. The navigational controls had been locked by logic codes, and Adric is entering the solution to the last code when the computer is destroyed by a dying Cyberman. He dies in the crash, while his fellow crewmates watch in horror on the TARDIS viewscreen. His last words before the explosion kills him are….“Now I’ll never know if I was right.”