tip of the iceberg

And that's just the tip of the iceberg.

"We're at the tip of the iceberg," smiles Brown.

But the charity believes this figure is just the "tip of the iceberg".

Sony called the breach “just the tip of the iceberg,” contending the network engaged in broader misconduct, including that it garnered below-market prices for the shows internationally and domestically, preferencing its own wholly owned shows in its licensing negotiations.

Detectives fear the four victims could just be the tip of the iceberg.