বিগ ব্যাং তত্ত্ব 

Experimental physicist Leonard Hofstadter and theoretical physicist Sheldon Cooper; Penny, a waitress and actress; Howard Wolowitz, an Aerospace engineer and Rajesh Koothrappali, a particle astrophysicist postdoc. Watch the full season now!
মূলশব্দ: big bang theory, full episode, season 4, tv প্রদর্শনী, free চলচ্চিত্র