https://www.metv.com/stories/fear-was-a-powerful-motivator-for-henry-winkler

How Winkler used his anxieties to his advantage.

Pat Morita was a standup comedian before finding success on Happy Days (https://www.metv.com/stories/pat-morita-was-a-standup-comedian-before-finding-success-on-happy-days)

Did you know Arnold had his own jokes?