Final answer:
Bryan Cranston, before winning six Emmys for 'Breaking Bad,' had a recurring role as Dr. Tim Whatley, a dentist, on the NBC sitcom 'Seinfeld'.
Step-by-step explanation:
Long before Bryan Cranston won six Emmy Awards for his role as Walter White on "Breaking Bad", he played the character of Dr. Tim Whatley, a nitrous-oxide-huffing dentist, on the beloved NBC sitcom "Seinfeld". His recurring role on this show showcased his comedic talents and versatility as an actor, contributing to his successful career that later led to his acclaimed performance in "Breaking Bad". Dr. Tim Whatley was first introduced in the fifth season of "Seinfeld" and appeared in several episodes throughout the series.