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"

Kunal Nayyar shirtless in The Big Bang Theory 11-08 "The Tesla Recoil"

Jim Parsons shirtless in The Big Bang Theory 10-15 "The Locomotion Reverberation"

Kunal Nayyar and Kevin Sussman shirtless in The Big Bang Theory 10-05 "The Hot Tub Contamination"

Kunal Nayyar shirtless in the Big Bang Theory 9-18 "The Application Deterioration"

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

Jim Parsons shirtless in The Big Bang Theory 9-11 "The Opening Night Excitation"

Johnny Galecki in The Big Bang Theory 9-09 "The Platonic Permutation"

Jim Parsons shirtless in The Big Bang Theory 8-14 "The Troll Manifestation"

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

Jim Parsons in the Big Bang Theory 8-01 "The Locomotion Interruption"

Jim Parsons shirtless in The Big Bang Theory 7-20 "The Relationship Diremption"

Jim Parsons and James Earl Jones shirtless in The Big Bang Theory 7-14 "The Convention Conundrum"

Johnny Galecki shirtless in The Big Bang Theory 7-08 "The Itchy Brain Simulation"

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"

Kunal Nayyar shirtless in The Big Bang Theory 6-17 "The Monster Isolation"

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

Kunal Nayyar shirtless in The Big Bang Theory 6-06 "The Extract Obliteration"