The Big Bang Theory Season 8 Episode 8 - The Prom Equivalency.brThe Big Bang Theory Season 8 Episode 8 Sneak Peek - The Prom Equivalency [HD] Promotional Photos When the gang recreates a high school prom on the .brSubscribe brThe Big Bang Theory Season 8 Episode 8 Sneak Peek - The Prom Equivalency [HD] Promotional Photos When the gang recreates a high school prom on the .