I started an escaped prisoner quest with the compagnion vilkas.
When i got out of whiterun, the pointer showed back in, and when i got in the pointyer showed out again, etc etc.
The prisoner must have fled into a wooden door, because when i restarted from an earlier save, there was no way to start before the quest begun, or i had to go too far back, and loose many days.
Every save started where the quest already had begun, but the prisoner would not show up anymore.
Now i can not get another quest here, because they already given me one.
My question:
How can i reset such a quest, and start again?

