The concept of promises and "keeping one's word" is a common theme.
- Georgina Daramount to Abraham "His word was given, and his word cannot be broken"
- Lara Hodge to Clarkson "You and I had an agreement Casey, where I'm from, we keep our word"
- Laura to Daramount "We made a deal. He was part of it. and we keep our word, remember?" 
- Lara to Hisao "On that you have our word--and I'm sure you understand what that means"
- Oliver Simon says "like you, we honor our word" to Clarkson when she is there to take Ian 
- Mr N. to Irina regarding assassinating Zoe "You know we operate under certain...agreements. And taking this target's life, if someone like myself were to do it, would fall under a flagrant violation of those terms. And we keep our word."
- Susan Dagney to Laura and Georgina "Remember, we keep our word--and this is the most sacred of our promises".
- Susan Dagney to Casey "You seem surprised. This was the promise we made to you, was it not?".
- The headmaster to Casey "I wanted to talk to you sooner...but promises have been made and I have to honor them".