He has three sisters, including Neisha Patel, who is a vascular neurology fellow at Columbia University Medical Center.

[5][6] Dayal started his career appearing in national commercials for McDonald's, Windows, Nintendo, and Domino's Pizza.

He played a small role in The Sorcerer's Apprentice and Paula van der Oest's Domino Effect.

After guest-starring on CSI: Las Vegas on CBS, Dayal went on to play Hal, a code-breaking computer analyst, on the AMC series Rubicon.

He also played Raj Kher, an alternative college student recovering from cancer, in the third and fourth seasons of The CW's 90210.