H is for... Hopper

Hopper was the captain of a rocket ship which had been hired by an archaeological expedition to take them to the planet Telos. The expedition leader was Professor Parry, and it was being financed by a couple named Eric Klieg and Kaftan. They had come to investigate the last resting place of the Cybermen. 

Shortly after a pair of giant metal doors was uncovered, Hopper lost one of his men when he was electrocuted trying to open them. Kaftan had offered a financial reward to open them. Later, Hopper reported that the rocket had been sabotaged. He refused to allow the expedition members to stay overnight in the ship, as they would have gotten in the way of repair work. The Doctor suspected that the sabotage was the handiwork of Kaftan's manservant Toberman.

After the expedition succeeded in accessing a lower level of the Cyberman tombs, Victoria had to fetch Hopper to rescue the party. Kaftan had locked the expedition members in, then pulled a gun on Victoria.

Hopper and his co-pilot, Jim, succeeded in opening the hatch to the lower level and employed smoke bombs to allow the party to escape the revived Cybermen.

Hopper eventually took the few surviving members of the expedition back to Earth.

Played by: George Roubicek. Appearances: The Tomb of the Cybermen (1967).

• Austrian born Roubicek mostly works in dubbing of foreign language films these days. He appeared in two James Bond movies - You Only Live Twice and The Spy Who Loved Me - as Russian characters, but he is also one of that elite group of Doctor Who actors who have played Imperial Officers in a Star Wars movie. Roubicek is the officer who reports to Darth Vader just after his initial entrance at the beginning of the movie.