Cable is a mutant from the future with a messiah complex. He knows the future and therefore believes he is responsible to fix the present. He is a telepathic telekinetic with seemly unlimited power. He was infected with a techno virus as a child, hence the metal arm.
Deadpool aka the merc with a mouth is an assassin that constantly breaks the fourth wall. Deadpool actually does not even know who he really is. Is he Wade Wilson, is he T-Ray, Loki's son? Even though he does not know his own identity he possesses unique abilities. His healing factor puts Wolverine's to shame. Deadpool is also an expert marksman, swordsman and martial artist. Deadpool has killed for fun and has no allegiance to good or evil.
These two characters team up for an unforgettable 50 issue series. Throughout the series they are both allies and enemies. They tangle with noteworthy friends and foes such as Spiderman, Captain America, Sinister, Red Skull, and the Fantastic Four. They also have quite a few run ins with lessen known characters such as Domino, Alex Hayden, Taskmaster, and Bob. Bob is a former agent of Hydra that is either Deadpool's friend or captive, depending on the situation. This series also has cross over issues during Civil War.
Cable and Deadpool has everything, from island creation, to time travel, to alternate universes, to no one ever really dying. This book is a great example of why we love comics. I give this series a 7.5 out of 10. It is wildly entertaining.