The+big+bang+theory+season+1+2+3+4+5+6+7+8+9+10+free -

Key Episodes: "The Decoupling Fluctuation" (S6E2), "The Bakersfield Expedition" (S6E13) Howard goes to the International Space Station. The show handles long-distance relationships with surprising heart. Meanwhile, Sheldon and Amy’s "coitus" negotiations begin.

Key Episodes: "The Electric Can Opener Fluctuation" (S3E1), "The Adhesive Duck Deficiency" (S3E8) Leonard and Penny finally date. Sheldon gets stranded in the desert. This season won the TCA Award for Outstanding Achievement in Comedy and is widely considered the peak of the show’s writing. the+big+bang+theory+season+1+2+3+4+5+6+7+8+9+10+free

Key Episodes: "The Proton Displacement" (S6E7), "The Romance Resonance" (S7E6) Professor Proton (Bob Newhart) becomes a recurring role. Penny quits acting and takes a real sales job. The show starts to pivot from "nerds are weird" to "nerds are successful adults." Key Episodes: "The Decoupling Fluctuation" (S6E2)