This has to be one of my favorite seasons so far.. All seasons before this were leading up to this moment. All cast members are stand out in their performances. Jim Parsons is a special stand out as he and the cast members are really hitting their groove by now. Most times CBS really lets shows get weak by this time but the writing here and the acting is superb. There are some special stand out episodes: The 2003 Approximation, The mystery date observation, The Convergence Convergence.. Plus this is the season where Sheldon and Amy take their relationship from break up to coitus, Leonard and Penny get married, we meet some of Leonard's extended family... and who could forget Sheldon's Meemaw!! This is a must see season. get it now while on sale!!