: Sheldon eventually visits Tam in his office and "forgives" him, though Tam remains hilariously confused about the severity of the grudge.
: The episode highlights how much Sheldon has grown and the value of his current "found family". Subplot: Meeting Anu [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" : Sheldon eventually visits Tam in his office
When Tam reaches out to Sheldon after 20 years because he is visiting Caltech with his son, Sheldon is visibly upset. He reveals that Tam has been on his for decades. It resolves a long-standing mystery: why has Sheldon
: According to Sheldon's list, Tam simply "knows what he did".
: 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: