Paco (played by José Luis Manzano) is a protagonist in Overdose.
Heroin-addicted youth entangled in crime and Basque political turmoil. Evaristo Torrecuadrada (played by José Manuel Cervino) is a protagonist in Overdose.
Paco's loyal friend navigating the harsh realities of 1980s Madrid underworld. Martín Aramendía (played by Luis Iriondo) appears in Overdose.
Paco's associate caught between loyalty and survival in the criminal underworld. Urko (played by Javier García) appears in Overdose.
Fellow delinquent sharing Paco's struggles with addiction and violence. Mikel Orbea (played by Enrique San Francisco) appears in Overdose.
Youth caught in the cycle of poverty, drugs, and political violence. Betty (played by Andrea Albani) appears in Overdose.
Paco's romantic interest struggling to support him through addiction. Eulalia (played by Queta Ariel) appears in Overdose.
Family member struggling to cope with the consequences of crime.