Joseph Marcell, known for his role as Geoffrey in the original Fresh Prince series, will guest star in Bel-Air's season 3 as a mysterious family member. The show, a modern retelling, features original star Will Smith as an executive producer. Marcell's casting posed challenges due to his busy schedule and living in London. Season 3 promises a shift to a summer setting, exploring new dynamics and emotional depths for the characters, with a mix of fun and intensity.