Click the + icon next to an object in the hierarchy, in order to view the next level down.
Click the - icon next to an object in the hierarchy, in order to hide that level in the hierarchy.
You can have as many levels in your hierarchy as you wish, with as many different object types as you wish.
If you click on a specific object in a hierarchy, you will be able to view any information about it, such as any metadata associated with the object. Below you can see an example of an 'Episode' including the metadata associated with it.