Hank Henderson is a grifter that Jack Smith paid to spend time with Stan so he wouldn't have to in "Henderson", allowing him to believe he was an imaginary friend.
After annoying Francine by going out without her, Hank Henderson stops by looking for Jack, who is deceased, but was stiffed on his payment for spending time with Stan and demands it from Francine. She overpays Hank on the condition that he convinces Stan that he should take her out dancing. Catching him at the club, he follows though as requested. But after their night out, Francine finds that she can't get rid of him as he threatens to expose the secret that he's not a figment of Stan's imagination and insist that the payments keep coming in exchange for further jobs.
Francine tries to demand that Stan banish him, so he takes takes Hank skydiving and pushes him out of the plane without a parachute where he crashes into Francine's car as she tries to stop them. Stan lands on their heels, and remains completely oblivious that Hank is real as Francine goes into shock. On the drive home with Hank still on the hood of the car, Francine finally gets it though to Stan that his father and she both paid Hank to spend time with him. Stan takes the news well as he instructs her to ditch the body. Still in shock the following Monday morning, Stan assures her that Hank has been erased by the CIA, and to make her feel better, he offers to send a CIA grief counselor to help her. The counselor leads her to believe that their casual conversation led to seven cruise missiles being launched at an Iraqi village at her command, and after thinking about it Francine admits she really feels nothing because she had no idea it was going to happen. She further realizes that nothing she did could have stopped Hank's death and feels better. But when Stan stops by the house, it's revealed that the counselor is really a figment of Francine's imagination.