Kaley Cuoco, Johnny Galecki, and Jim Parsons in The Big Bang Theory (2007)
Episode 2.11: The Bath Item Gift Hypothesis (2008)
But during twelve years we have slowly watched him evolve into a more affectionate and "human" character. And now, he is far from the emotionless robot we were first introduced to.
So, which of Sheldon's emotional or physical milestones has been your favorite throughout the series?
NOTE: This list contains spoilers
Episode 2.11: The Bath Item Gift Hypothesis (2008)
Episode 3.23: The Lunar Excitation (2010)
Episode 5.10: The Flaming Spittoon Acquisition (2011)
Episode 5.16: The Vacation Solution (2012)
A: Either party is in danger of falling off of a cliff, precipice, or ledge.
B: Either party is deserving of a hearty handshake after winning a Nobel Prize.
C: Moral support during flu shots.
Episode 5.24: The Countdown Reflection (2012)
Episode 7.15: The Locomotive Manipulation (2014)
Episode 7.17: The Friendship Turbulence (2014)
Episode 7.22: The Proton Transmogrification (2014)
Episode 8.8: The Prom Equivalency (2014)
Episode 8.16: The Intimacy Acceleration (2015)
Episode 8.24: The Commitment Determination (2015)
Episode 9.10: The Earworm Reverberation (2015)
Episode 9.11: The Opening Night Excitation (2015)
Episode 10.4: The Cohabitation Experimentation (2016)
Episode 10.7: The Veracity Elasticity (2016)
Episode 10.24: The Long Distance Dissonance (2017)
Episode 11.24: The Bow Tie Asymmetry (2018)
Added on May 30, 2018
Episode 12.24: The Stockholm Syndrome (2019)
Added on May 22, 2019