Baldur's Gate II: Shadows of Amn/Irenicus' Dungeon

Setting Free Minsc and Jaheira
Now Imoen is your party is time to free some fellows who can help you. Head north and east (x 4030 y 2760) and Minsc will talk to you. Enrage him by selecting options 1,2,3,1 and he will enter your party. You got 3000 XP for that.

Now you have to free Jaheira. Go north (x 3900 y 2675) and talk to her. Agree freeing her if you want Jaheira in your party. You can't unlock the cell so you have to find the key.

Go left to the room there (x 3250 y 2850). The key is on the table.