When Leonard, Howard and Raj try to find out why Sheldon no longer speaks to his childhood best-friend, Tam, they turn to Sheldon's list of mortal enemies. Howard mentions that the list is available online with a new interface that can be searched by first name, last name and length of grudge.
Season 12, Episode 4 - The Tam Turbulence
⌛ Timestamp in the episode:
From
00:03:42
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00:06:00