Season 1 (1993–94)
Ashley Hunter-Coddington (Catherine Oxenberg) – A former British MI6 operative and one of the co-leaders of the H.E.A.T. team. She is the daughter of an English ambassador stationed in Rome. Her mother was killed by a Red Brigade member while she was still a child. This traumatic event triggered the need to become a government agent. Her codename is "Sarong" and she worked undercover as a beach fashion designer.
Michael "Mike" Savage (Brendan Kelly) – A former CIA agent and co-leader of the H.E.A.T. team. He also posed as a beach fashion designer for the model agency and his codename is "Platform".
Catherine (Cat) Avery Pascal (Alison Armitage) – A French ex-cat burglar, who was required to join the team after being arrested for her crimes. She had to stay with the team for a year in order to avoid prison sentence. She eventually accepted that being on the side of justice was far better. She poses as one of the models of the agency and her codename is "High Dive".
Brett Richardson (Spencer Rochfort) – A former Navy SEAL and the team's weapons and explosive expert. Posed as one of the team's models and his codename is "Deep End".
Krissie Valentine (Holly Floria) – A computer expert. She provides the team with useful information and research for their missions. Poses undercover as one of the models of the agency and, through the season, got romantically involved with Marcos. Her codename is "Spring Board".
Marcos Chavez (Randy Vasquez) – A member of the Federales in Mexico and an expert in undercover missions. He was romantically involved with Krissie. He poses as the one responsible for providing transportation for the equipment the team uses during their work in fashion (and actually, with the equipment used on their missions) and also as a Taxi driver. Most of his family members have served as providers of useful information. His codename is "Agua Azul".
Tommy Chase (Michael Worth) – A government member responsible for personality analyses. He is an expert in martial arts and has the "zen warrior" mentality. Poses as one of the team male models; his codename is "Backflip".
Arthur Small (Graham Heywood) – Owner of the beach fashion enterprise, Acapulco Heat beach fashion, which served has the cover for the H.E.A.T. members. Also helped sort out the logistics of each mission.
Claudio Divanti (Fabio) – Owner of the hotel where the team have their headquarters. Used to flirt with Ashley, much to Mike's dislike.
Mr. Smith (John Vernon) – One of the government representatives of C-5, a secret coalition that tasks H.E.A.T. with their missions. C-5 was composed by various members of the U.N. He is seen only via video link.
