If I understand it correctly this episode was supposed to be the season finale, but they threw it in the middle to swerve people and get some buzz. I can definitely see all the points you made be brought up in future episodes. Hell, they could make a road to episode out of finding the killer.Yeah, I understand. But the whole writing concept of it was so bad.
From 1999 to 2013, they kill off a main character with a random car pulling out of his drive way and running over Brian?
Why didn't Stewie go to kill the man who ran over Brian?
Why didn't Stewie continue going on search to find the part he needed to build a time machine?
I mean, if he was his best friend, why not?
Within the first 15 minutes they killed a main character and by the last 15 minutes, he has been replaced and possibly forgotten.