Merlin the mechanical owl will recover the fuel cell for you. Feed him a robot mouse and he will retrieve the dropped fuel cell : point to him, then to it.
The key in the dungeon doesn't work. You throw the switch and come into the cell from the back way. (see the related question)
The cell is only "blocked" by the bars on the dungeon side. When you throw the switch, it opens the back gate, which leads to Mordred's underground lab. (see related question)
i do not know what you are talking about
All you can do is open the back way to the cell in the dungeon, by throwing the switch. You can get in the "back way" through Mordred's underground lab. (see related question)
The bars you see from the tunnel in Mordred's lab are the back bars of the dungeon cell where the robot invader is being held. When you get the cheese from the dungeon, you have to throw the wall switch that opens it. You can push through the dirt wall to reach the cell. You will need the owl to retrieve the fuel rod from the robot.
you can not
it is in the dungen cell.
You have to feed him the mouse. Merlin the owl will follow you into the passage to the dungeon cell, and you can click on him and then the fuel rod and he will get it for you.
give him the robot mouse from the cell
There is no way into the cell from the library. Throwing the switch opens the "back gate" to the cell, which you can access from Mordred's underground laboratory. (see related question)
Feed the mouse to Merlin, the mechanical owl, and he will follow you into the cell. Click Merlin, then the vial, and he will retrieve the fuel rod for you.
Feed the robot mouse to the owl, and then he will follow you. In the dungeon cell, click the owl, then the fuel rod, and he will retrieve it for you. (see related question)