Numbuh Infinity(/∞) was one of the diplomats working with Numbuh 362 to make peace with the teenagers inOperation: T.R.E.A.T.Y.. Later, he was seen talking withChad, who was heard saying "No way! I've worked too hard to be double crossed like this!". Numbuh Infinity then replied, "You know it was not my decision! They just told me to tell you!". Numbuh 1 correctly suspected that Chad and Numbuh Infinity were working together with the KND Splinter Cell and confronted him. Numbuh Infinity then claimed that Chad was trying to attack him, and he was about to have Chad attackNumbuh 1 when a group, led by Numbuh 86, broke into Numbuh Infinity's office and caught Chad.