Zack appears in "Brain Drain". He was a student at Beverly Hills High who was impressed by Samantha's study skills and memorization abilities and asked her out on a study date which Sam was excited for but their date is ruined due to Sam's memory loss after appearing on Margie and Wink Weatherdale's show. After returning back to normal, Sam tries to ask Zack out on another date but Zack goes out with Mandy instead thinking she is better for him. Sam is not angry since he fell for Jerry Lewis's lame lies to distract him.
Zack is yet another man who follows Sam's trend of falling for or crushing on men that look like Tim Scam as he also has brown hair, tan skin and green eyes and showed up after Scam's first appearance.