When watching Cohen observe his masterpiece, I accidentally hit him with the wrench (I dropped my controller). The lights went red, and he proceeded to attack me with the usual Houdini Splicer shtick (except with unusually high health, of course). If I let him kill me and go back to the Posideon Plaza Vita-Chamber, he's still there watching like normal but will attack me again if I drop into view.
If I don't actually kill him, will I still be able to get into his apartment later on? Or do I have to reload my last save (right after killing his first "disciple")?