Read the Harper records available in the safehouse.
Cleric CAN do something about Mal
Cleric CANNOT do something about Mal
Talk to the Selûnite cleric manning the med bay.
Interrogate Malkarion
Talk to Veska
Kill Malkarion
Go find a Zhent safehouse
Visit the Silver Sanatorium
Rendezvous at the Harper safehouse
Look for you-know-who