Go to Window>Timeline and you'll see your sequence (or "layers panel") there. Is this what you're referring to?
yes, thank you. I feel like a moron now. At least I can get back to what I was doing.
I also find it useful to do a Workspace Save, when I have things setup as I like. You can access it from the same drop-down on the Toolbar, Window>Workspace>Save_As. I have a half-dozen custom Workspaces, that I use. This can be a real time-saver, when Panels get closed, moved off-screen, or similar.
In versions prior to CS4, the Workspace is saved with the Project. Do not know if that has changed.