2010s

Events that happened in the 2010s

2016

 * 4 long awaited family members of the main cast made their first ever appearances
 * Sheldon's maternal grandmother Constance whom he calls Meemaw in "The Meemaw Materialization" (S9E14)
 * Leonard's father Alfred Hofstadter in "The Convergence-Convergence" (S9E24)
 * Penny's mother Susan and Penny's brother Randall in "The Conjugal Conjecture" (S10E01).