Tobar said:

My experience with Bad Robot television productions is that they're excellent at creating emotional moments but SUCK at plotting.

They often start off with one direction in mind but by the beginning of the next season they seemingly get bored and start heading somewhere else. Plot holes be damned. Most of their productions feel aimless with no ultimate goal in mind. Just making up whatever they can on the fly to keep the ball rolling as long as possible.

Ah, so Bad Robot is responsible for Ghost Whisperer. ;-)