: When Sheldon was accepted to grad school at Caltech, Tam promised to move to California with him and be his roommate.
: Sheldon's friends (Leonard, Howard, and Raj) are shocked to learn Sheldon had friends before them.
: 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
The fourth episode of The Big Bang Theory's final season, serves as a bridge between the flagship series and its prequel, Young Sheldon . It resolves a long-standing mystery: why has Sheldon Cooper never mentioned his first-ever best friend, Tam Nguyen? 🌪️ The Conflict: "He Knows What He Did"
While the guys deal with Tam, Penny and Bernadette take Raj's fiancée, , out for dinner. "The Big Bang Theory" The Tam Turbulence (TV Episode 2018) : When Sheldon was accepted to grad school
: Tam stayed in Texas after meeting a girl, leaving Sheldon to move to California alone.
: The episode highlights how much Sheldon has grown and the value of his current "found family". Subplot: Meeting Anu The Truth: A Promise Broken Sheldon eventually reveals
: According to Sheldon's list, Tam simply "knows what he did".