How does Gandalf rescue Bilbo and the dwarves in The Hobbit?

Answer 1

I think he rescues them numerous times, but the one that first comes to my mind is when he rescues them from the Trolls, by keeping them arguing until the sun rose up and turned them all to stone.

Answer 2

Gandalf turns off the lights and his wand lights up and he goes and gets the prisoners and they are free while the goblins try to reach the light