. >> reporter: chris jewell is another unlikely hero.nthusiastic, jewell is taking part in his very first rescue mission. >> the visibility throughout the whole operation was really, really poor. >> reporter: together with two other brits, collectively dubbed the "awesome foursome," they have pulled off a flawless two days of cave rescues. but day three brings complications. >> everybody was like, "hey, we're not gonna be able to continually execute the way we did on day one and day two." >> reporter: the weather is one obstacle. the number of people that still need to come out of the cave -- another. four boys, one coach and four thai military members are still inside. >> on day number three, we had to bring out an extra person. so, in order to do this, jason mallinson swam through the final underwater section twice. >> i wish i'd never volunteered for it. to be honest, i knew the visibility was going to be bad. >> they also understood there just was not any other option. if these kids are getting, you know, saved, it's gonna have to be