Beamer Appendix slides, and controlling frame number

The following example LaTeX document shows how to manipulate the frame counter.

\begin{document}


% Regular slides here


% After your last numbered slide
%\appendix % OPTIONAL
\newcounter{finalframe}
\setcounter{finalframe}{\value{framenumber}}


% Backup slides here


\setcounter{framenumber}{\value{finalframe}}
\end{document}


The 'plain' option removes the footline and frame counter

\frame[plain]{
\frametitle{TITLE}
   %TEXT
}

Source: http://www.stanford.edu/~dgleich/notebook/2009/05/appendix_slides_in_beamer_cont_1.html