Where's their respect, sir? Where's their sense of the right thing?
You're tired, and you've a different way of seeing things Spender. That's a fifty-dollar fine for you.
I'm sorry this is happening. I'm sorry about it all.
I am too. I guess I'd better take you back now so you can start the attack.
After Spender gets into a fight with one of his teammates, Biggs, over his reckless attitude, he was pulled over to talk to Wilder about his reasons for his sudden hostility towards Biggs. When Spender complains about his teammates' lack of dignity and respect to the environment of Mars, Wilder defends their actions as wanting to have fun and punishes Spender with a fifty-dollar fine.
Seeing his teammates act wild and disrespectful to the Martian environment, Spender immediately departs from his group to explore the Martian ruins after being interested in their culture out of honor for the dead Martians. After he was reported missing, Spender comes back to kill all but two of his teammates hoping that the humans won't start settling on Mars. When Parkhill and Wilder find in the hills, Wilder tries to reason with him to no avail for Spender.
After Parkhill shoots Spender down, Wilder prevents his vengeful teammate from killing Spender by consoling the dying man and being told why he killed his teammates. When he realizes Spender was trying to preserve and study Mars in its former glory, Wilder promises his dying teammate that he will continue to protect Mars in its good condition for now on. After catching Parkhill use some of the Martian ruins as target practice, Wilder punishes him with a punch to the face.