Tobias "Four" Eaton Timeline & Summary

After fleeing the Amity compound, Tobias ends up with the leader of the factionless: his mother, Evelyn, who—holy cow—is still alive.
Tobias takes this in stride. At least she's not as terrible as his father, Marcus, right?
Tobias and Tris are interrogated by the Candor, and, afterward, the Dauntless traitors attack.
Tobias saves Tris from the attack, although "save" isn't exactly the right word. She managed to stab Eric all by herself.
Still, Tobias thinks she acted recklessly, and treats her as such.
After the simulation that kills Marlene, Tobias begs Tris not to do anything reckless or stupid.
Tris immediately does (at least, it's reckless and stupid to Tobias), and he has to save her from the Erudite compound.
On the day of Tris's execution, Tobias gets her out. With former archenemy Peter's help.
Tobias is elected Dauntless leader along with Tori, and they decide to align with Evelyn and destroy Erudite.
Which they do… however, Tobias finds out that Tris was working with his dad the whole time. He is so not happy about this.
Despite his anger, Tobias ends up assisting Marcus, anyway (if only he'd done this in the first place), and recovers a video that will change everything.