[s12e4] The Tam Turbulence Guide

: The episode highlights how much Sheldon has grown and the value of his current "found family". Subplot: Meeting Anu

: Sheldon's friends (Leonard, Howard, and Raj) are shocked to learn Sheldon had friends before them. [S12E4] The Tam Turbulence

: When Sheldon was accepted to grad school at Caltech, Tam promised to move to California with him and be his roommate. : The episode highlights how much Sheldon has

: The group tracks Tam down on campus, only to find that Tam has no idea why Sheldon is angry. The Truth: A Promise Broken Sheldon eventually reveals the source of his grudge to Amy: [S12E4] The Tam Turbulence