If you missed the start of Alien Secrets, Flight of the Kestrel book 2, here is the link. To help your imagination, I can’t show you a picture of Reuel, because he is Altairian, but here is my idea of Parks. Vigo Mortensen.
'What's this pain-giver?' Hoy asked Parks.
'Did you see the blood on the back of my shirt?' said Parks with a shudder. 'They fit a device over the top of your spine which directly attacks the nervous system. The bastard just plays with a little button and the results are excruciating.'
Reuel gasped. 'Tanu had blood on his shirt too, they must have used it on him,' he said. 'We must take him with us, sir.'
Hoy shook his head. 'We’ll need to help Parks as it is. We can’t possibly take Tanu - who knows what state he'll be in when they bring him back?'
'I’m stronger than I look, I’ll carry him,' said Reuel.
Parks spoke up from the mattress. 'Who is this Tanu guy - did you learn anything about him? I wouldn’t be happy leaving anyone to the “tender” mercies of the Bokans.'
'He only said he was an explorer,' said Reuel. 'We really must help him, if we can.'
Parks understood Reuel didn't want a life on his conscience.
Reuel looked around. 'This water container is quite flimsy, but the bread plate is metal. Maybe we can hit one of the guards with it while we stick the knife in the other one. If we put them out of action and take their weapons, then you can help Parks and I can carry Tanu.'
'Now you’re starting to think clearly,' said Hoy, 'but you're taller than me and I'm stronger. You help Parks and I'll carry Tanu.' He turned to Parks. 'Eat some of this disgusting bread and then get some rest. We need you as fit as possible for the escape. Reuel and I will sort out the details.'