Non-fully-hierarchical website structure and use of breadcrumbs

I have a web page with a menu on the left. Each choice can bring to either:

  • A single page
  • A wizard
  • Or a hierarchical series of pages, where I can drill down.

     Left panel        Right side
    
     Item 1 ---------> single page
     Item 2 ---------> wizard
     Item 3 ---------> hierarchical
     Item 4 ---------> wizard
    

Now, I want to add something to allow the user to go back more easily in hierarchical or wizard pages.

I thought about using a breadcrumb, but it works well only for hierarchical pages. I cannot use it in wizards or single pages.

I want to have my pages coherent, so I was thinking to a different solution. Any idea?