The 4400

Lily and Richard are making a happy home with Jordan Collier as their billionaire babysitter. dirty diapers are the least of Colliers problems as Maia gets a vision of Colliers death.
They further clarify that Maia has premonitions and impressions, or something to that effect. Her premonitions are never wrong and unchangeable. Collier visits Maia and confirms shes no fraud, he also gave her a PSP(PlayStation Portable).
After saying no to the agents help Collier agrees to let them help after stopping one nut job from shooting him. Collier seeks guidance from the seemingly evil baby Isabelle and she shows him what he wants to see, a vision of him as an old man being honored.
Lily's daughter Heidi finds out about her real mama and goes for a visit Isabelle gets all cranky and cries. a day or two later Lily gets word that Heidi's spleen exploded mysteriously. Bad baby, no, don't you dare.
Collier goes to the meet-up of the 4400 and gets shot to death. He tells Shawn that "she[Isabelle] lies". Shawn the second in command tries to heal him but fails although he's caught on film. During the funeral Shawn assumes leadership and Collier disappears, remember we never saw Colliers gift or know if baby Isabelle is bad.
What we do learn is that the shooter is Agent Toms' son Kyle. His blackouts are explained by him gathering and getting rid of sniper rifles. Kyle as you recall is the human-walkie-talkie of the future people. If he's anything like French Stewart on 3rd Rock From The Sun he is being used,through the radio in his head, to carryout missions that threaten the future.
There was also a sub-plot involving Shawn and a hot drug addict that is now cleaned up and has new underthing.

On a sidenote:
The new USA channel commercials are great. My favorite is the one with a cat meeting dozens of horrible deaths and at the end we see Johnny Smith(The Dead Zone) petting the cat and saying I need to get a dog.
Two involve Maia Rutledge(The 4400) first in a hospital telling the sex of pregnant women babies. The other has her biking with a boy to a stadium having him hold out his glove and then he catches a ball hit out of the park.
There was another with Johnny Smith grab a mailman's hand and yelling then going just kidding.
I think there were more but I can't remember.
Update: I remember another commercial the one with Maia gathering bugs in a jar and then the power goes out and all these jars full of fireflies light up the house.