The Series

Main cast

 * Stuart Damon as Craig Stirling
 * Alexandra Bastedo as Sharron MacReady
 * William Gaunt as Richard Barrett
 * Anthony Nicholls as Tremayne
 * David Bauer (Uncredited) as Opening Voice-overs

Plot
Craig Stirling, Sharron Macready and Richard Barrett were agents for Nemesis, an international intelligence organization based in Geneva. Their first mission as a team was to investigate some potentially lethal experiments in Communist China, but when they were escaping, their plane was damaged. They crashed into a remote part of the Himalayas where they were rescued by members an unknown civilization. They came away from the encounter with superhuman powers--telepathy, superior strength, memory, etc.--and returned to the outside world as "Champions of law, order and justice", to quote the series' opening.

Episodes
http://thechampions.info/nms/cxc.htm