name a few characters from it?
Professor Bernard Quatermass, Victor Carroon, Paterson and Briscoe
The Quatermass Experiment
Along with his laboratory assistants, Professor Bernard Quatermass anxiously awaits the return to Earth of his new rocketship and its crew, who have become the first humans to travel into space. The rocket is at first thought to be lost, having dramatically overshot its planned orbit, but eventually it is detected by radar and returns to Earth, crash-landing in Wimbledon, London.

When Quatermass and his team reach the crash area and succeed in opening the rocket, they discover that only one of the three crewmen, Victor Carroon, remains inside. Quatermass and his chief assistant Paterson (Hugh Kelly) investigate the rocket's interior and are baffled by what they find: the space suits of the others are present, and the instruments on board indicate that the door was never opened in flight, but there is no sign of the other two crewmen.

Carroon, gravely ill, is cared for by the Rocket Group's doctor, Briscoe (John Glen),
what is "the quatermass experiment"? A British science fiction serial when was it aired? Summer of 1953
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The Quatermass Experiment [SEP] Plot
Along with his laboratory assistants, Professor Bernard Quatermass anxiously awaits the return to Earth of his new rocketship and its crew, who have become the first humans to travel into space. The rocket is at first thought to be lost, having dramatically overshot its planned orbit, but eventually it is detected by radar and returns to Earth, crash-landing in Wimbledon, London. When Quatermass and his team reach the crash area and succeed in opening the rocket, they discover that only one of the three crewmen, Victor Carroon, remains inside. Quatermass and his chief assistant Paterson (Hugh Kelly) investigate the rocket's interior and are baffled by what they find: the space suits of the others are present, and the instruments on board indicate that the door was never opened in flight, but there is no sign of the other two crewmen.