The Bus Pants Utilization

Their friendship becomes strained when Sheldon tries to take over Leonard's creation of a smart phone application that solves differential equations.

Season 4 | Episode 12

TV-14-DL
Cast

Jim Parsons

as Sheldon Cooper

Johnny Galecki

as Leonard Hofstadter

Kaley Cuoco

as Penny

Simon Helberg

as Howard Wolowitz

Kunal Nayyar

as Raj Koothrappali