My problem is that I had Teldryn Sero as my companion, but I dismissed him while I was in Whiterun to do the Boethia's proving quest. After I finished the quest and returned to the Retching Netch to hire him again he was not in his usual spot, I have searched for him, waited for days in Solstheim and to no avail. I think he's lost but if any one has been through this and fixed it please let me know how you did it.