In "Summer Belongs To You", Phineas mentions time traveling twice and Isabella comments that Phineas has traveled through time "twice", but because of the events in the credits of Quantum Boogaloo, no-one - including Isabella should actually know about the time-traveling.
Dalam "Summer Belongs To You", Phineas menyebutkan dua kali melakukan perjalanan waktu dan Isabella berkomentar bahwa Phineas telah melakukan perjalanan melalui waktu "dua kali", namun karena kejadian dalam kredit Quantum Boogaloo, tidak seorang pun - termasuk Isabella harus benar-benar tahu tentang perjalanan waktu.