Simon Helberg and Kunal Nayyar shirtless in The Big Bang Theory 12-07 "The Grant Allocation Derivation"

Kunal Nayyar and Simon Helberg shirtless in The Big Bang Theory 11-19 "The Tenant Disassociation"

Simon Helberg shirtless in The Big Bang Theory 9-12 "The Sales Call Sublimation"

Simon Helberg shirtless in The Big Bang Theory 8-06 "The Expedition Approximation"

Kunal Nayyar and Simon Helberg shirtless in The Big Bang Theory 7-02 "The Deception Verification"

Simon Helberg shirtless in The Big Bang Theory 6-18 "The Contractual Obligation Implementation"

Simon Helberg and Jim Parsons shirtless in The Big Bang Theory 6-09 "The Parking Spot Escalation"

Simon Helberg shirtless in The Big Bang Theory 4-16 "The Cohabitation Formulation"

Kunal Nayyar and Simon Helberg in The Big Bang Theory 4-10 "The Alien Parasite Hypothesis"

Kunal Nayyar and Simon Helberg in The Big Bang Theory 4-09 "The Boyfriend Complexity"

Simon Helberg shirtless in The Big Bang Theory 3-09 "The Vengeance Formulation"

Simon Helberg shirtless in The Big Bang Theory 2-16 "The Cushion Saturation"

Simon Helberg shirtless in the Big Bang Theory 1-13 "The Bat Jar Conjecture"