First 2 parts were okay, there was something interesting.
These thieves take hostages and lock themselves in the Royal Mint of Spain as a criminal mastermind manipulates the police to carry out his plan.
After the 3rd part, it lost its meaning. The series showcased all the National security agencies, the police, the politicans as villans. In my perspective, those theives seem to be nothing less than terrorists! Why the common public of Spain have sympathy towards these terrorists! Are they stupid or what? Does not make sense!