Thom is without question one of Rand and Mat’s most valuable allies.
While there, he assassinated Galldrian, the king of Cairhein.
Galldrian exists in the canon of the show, but whether or not Thom killed him is not known.
Thom next emerged in Caemlyn where he had an encounter with Mat.
After all, the need for Rand to reach Tear eventually has been acknowledged in-universe on multiple occasions.
However, his absence was much shorter, considering that Thom did indeed return in the following book.
His TV counterpart, on the other hand, skipped Prime Video’s adaptation ofThe Great Huntaltogether.
As a result, there was a sizable gap between Thom’s appearances.
Furthermore,The Shadow Risingfeatured no reunion between Mat and Thom.