Taggart - Season 3 (1987)

While a hapless dentist keeps trying to kill his invalid wife, Taggart and his new partner, Mike Jardine, investigate the murder of a satanist private eye found burned in a tunnel on the day of the equinox.

Taggart's former sergeant turned private detective, Kenny Forfar, begins poking his nose into the investigation. Mike Jardine goes undercover at a hippy commune.

Just as Taggart begins closing in on the murderous dentist, he receives a phone call from the dead private eye. Did the pathologist misidentify the body or is there black magic at play?

When a woman shoots her husband after discovering that he was having an affair, it appears to be a clear-cut case - until the police realise the man was already dead when he was shot.