Character movement always faces forwards

Hi all,

After making a lot of progress today getting a character to move on a plane responding to clicks, I've hit a wall when it comes to rotation and direction. I now have the character moving nicely and a smooth rotation using Quaternion.Slerp, but it always 'turns back to the front' direction during the move.

My face function:

 // Make the character face the direction of movement
 void FaceMovementDirection( )
 {
     
     Quaternion targetRotation = Quaternion.LookRotation ( targetLocation - thisTransform.position );
     
     targetRotation.z = 0;
     targetRotation.x = 0;
     //targetRotation.y = 0;
     
     float smooth = 2.0F;
     
     Vector3 tempVector = targetLocation - thisTransform.position;
     
     if (tempVector.magnitude > 0.1)
     {
         thisTransform.rotation = Quaternion.Slerp (thisTransform.rotation, 
                                                    targetRotation,
                                                    smooth * Time.deltaTime);
     }
     
 }

The move function:

 // Control the character
 void CharacterControl()
 {
     
     // Check to see if a new destination has been found
     if (state == (int)ControlState.FoundNewDestination )
     {
         
         // get a new movement position
         RaycastHit hit;
         Ray ray = cam.ScreenPointToRay ( Input.mousePosition ); // Get the position
         if ( Physics.Raycast (ray, out hit) )
         {
             
             // Found a new position, now is it a valid target?
             float clickDist = ( transform.position - hit.point ).magnitude;
             
             if (clickDist > minimumDistanceToMove )
             {
                 
                 Debug.Log ("Distance to Target:" + clickDist);
                 targetLocation = hit.point;
                 moving = true;
                 
             }
             
         }
         
     }
     
     
     Vector3 moveDirection = Vector3.zero; // declares an empty movement vector
     
     if ( moving )
     {
         
         if (character.isGrounded) 
         {
             
             moveDirection = targetLocation - thisTransform.position;
             moveDirection.y = 0;
             
             moveDirection = thisTransform.TransformDirection(moveDirection);
             moveDirection *= speed;
             
         }
         
         moveDirection.y -= gravityForce * Time.deltaTime;
         character.Move ( moveDirection * Time.deltaTime );
         
         
     }
     
     FaceMovementDirection();
     
 }

Any and all help would really be appreciated!