The Terrible 3 (also known as T3) are Daniel Miller's sibling's group name. The Terrible 3 include Robert, Tommy and Melanie Miller. They pull big pranks on people. In Season 3, the T3 want to stop the H2O (Diego's cousins, Hector and Oscar), who are new pranksters, from becoming Miami's top pranksters.
List of People They Have Pranked Edit
- Daniel Miller
- Emma Alonso (alongside)
- Maddie Van Pelt (only Robert and Tommy.)
- Jax Novoa (once in alternate scene)
- Katie and Sophie
- Diego Rueda
- Francisco Alonso
- Gigi Rueda
Their grandma gives them the money to buy the supplies for their many pranks.