Tom, along with his brother Pete go out to eat with Jim and Pam to celebrate the latter two's engagement and try to prank Jim by teasing Pam about being an artist.(Employee Transfer) They later text Jim "Pam okay. Welcome to the family", and both Jim and Pam seem pleased by their acceptance of her into the family.
Both he and Pete appear at Jim and Pam's wedding with their wives.(Niagara Part 1)
He is shown in a flashback to Jim and Pam's wedding, reading an excerpt from 1 Corinthians 13.(Paper Airplane)