[The_Judge]

As much as I hate to do this I have to agree with jimworcs. The OP doesn't say where this took place but if this was in one of their hubs, there is reserve crew just for instances like like this. The "timing out" should have been foreseen and planned for. These don't just happen. I would like to know more details of the situation though. Was it an already delayed flight? Was it a flight that was waiting for a crew from another flight that was delayed? Was it a first flight of the day? Was the flight at an out station and was it late in the night before? Lots of variables.