Foster: As the head of the agency, he knows all about history. Foster recruited Liam, Maddy, and Sal to be apart of an agency that involves time travel. Foster is very experience in this field; however he is getting old and believes he is not going to be around for much longer. He works alongside with all of the members in the agency to train them for an alteration in history.
Liam: Was due to die in 1912 while being aboard the ship called the "Titanic". Liam was saved by Foster because his ability to think quick and clearly in tough situations, causing him to become the team's field agent. Liam works alongside with Bob as they travel back in time to help fix history before a horrible time wave could be created. Liam has a strong irish accent and finds it hard to understand the others in the agency because he lived in a simpler time frame. Liam has to learn all about the history from 1912 to 2001 in order to understand why, also what, caused a time wave.
Maddy: While being on a plane in 2010, the plane was supposed to crash, causing her to die. Maddy is the field leader. Before her supposedly "death" she was a game developer which caused her to be recruited because of her intelligence in computers. Maddy knows secrets that no one in the agency knows. Maddy is in training and will soon be the head of the agency. Maddy is very geeky, but smart. Because of the time frame she lived in, it is easy for her to pin point what event was was cahnged and what time in history.
Sal: During a fire, she was to be dead in 2026. Sal was a champion in Pikodu, a future puzzle game. Because she was such a champion at this game. it allows her to notice minor changes in history. Everyday she goes to the same place and observes her surroundings which she is familiar with. If a small thing is changed she reports back to Maddy and announces what she notices, Sal is the team observer.
Bob: Bob is a robot support unit that was created by the Time Riders agency. He has a computer unit in his brain that allows him to remember information, learn new information, and suggest the best best solution to take in a situation. Bob goes back in time with Liam to teach him about how history should have been and also to protect him.