Instructor, Leslie Winkle 30 Episodes (2007-2016)
Barry Kripke, Kripke 21 Episodes (2009-2018)
Dr. Eric Gablehauser, Gablehauser 19 Episodes (2007-2008)
Ellen, Emily, Emily Sweeney 15 Episodes (2014-2017)
Beverly, Dr. Beverly Hofstadter 13 Episodes (2009-2019)
Dr. Koothrappali, Dr. V.M. Koothrappali 12 Episodes (2007-2019)
Pres. Seibert, Presdient Siebert, President Siebert 8 Episodes (2011-2019)
Mrs. Koothrappali 8 Episodes (2007-2012)
Mrs. Wolowitz, Mrs.Wolowitz 7 Episodes (2007-2014)
Arthur Jeffries, Prof. Proton, Prof. Proton/Arthur, Professor Proton 6 Episodes (2013-2018)
Janine Davis, Mrs. Davis 5 Episodes (2013-2017)
Halley, Halley (O.S.) 5 Episodes (2016-2019)
Guard, Police Officer, Security Guard 3 Episodes (2010-2016)
Dr. Ramona Nowitzki, Ramona 3 Episodes (2008-2017)
Cleaning Lady, Maria 3 Episodes (2008-2015)
Analeigh, Vanessa 2 Episodes (2008-2015)
Dr. Elizabeth Plimpton 1 Episode (2010)
Dr. Catherine Millstone 1 Episode (2009)
Security Guard No. 2 1 Episode (2015)
big bang theory,
the big bang theory,
big bang theory cast,
the big bang theory cast,
big bang theory season 12,
What is the big bang theory ?,
Where to watch big bang theory?,
Is big bang theory on netflix?,
Is the big bang theory on hulu?,
How did big bang theory end?,
big bang theory season 12,
big bang theory season 11,
the big bang theory season 12,
the big bang theory season 11,
the big bang theory season 12 episode 24,
How many seasons of big bang theory?,
How many seasons of big bang theory are there?,
How many seasons of the big bang theory?,
How many seasons big bang theory?,
How many seasons of the big bang theory are there?,
