Kelso sitting, Sparks was the radioman.
Loved the series as a kid.
As I remember there were two guys Kowalski & “the Chief” who were kind of like South Park’s Kenny. every episode they were captured by aliens, captured by monsters, eaten by monsters or turned into monsters. Captain Crane & “the admiral’ would figure out a clever solution and get them out of it. Then next episode the whole cycle repeats!