Guest Stars David Silbey as Himself (David Silbey - Cornell University) Christopher Capozzola as Himself (Christopher Capozzola - Massachusetts Institute of Technology) Mitchell Yockelson as Himself (Mitchell Yockelson - National Archives and Records Administration) David Willey as Himself (David Willey - The Tank Museum, UK) Christy Campbell as Himself (Christy Campbell - Journalist & Author)