Drivers Seat Soaked

Sometimes when it rains my drivers seat will be soaked, or will be leaking. From half way from the window down towards the windshield, also by the controls of my electric sunroof... The headcover was removed and thought it was the sunroof leaking so it was sealed shut... the problem has reoccured... what do you think it could be and how would i go about fixing the problem?

Remove the trim around the drivers door area and get in the car and close the door. Have someone spray that half of the car with a garden hose until you get water coming in and just follow it up to where it starts coming inside.