S4.E1 ∙ The Infernal SerpentWed, Jan 3, 1990An environmentalist professor is mugged and later dies of a heart attack after an attack on campus just prior to a controversial debate.7.8/10 (903)Rate
S4.E2 ∙ The Sins of the FathersWed, Jan 10, 1990The managing director and heir apparent to a venerable family-owned brewery in dire financial straits is found drowned in a vat of his own ale.7.7/10 (813)Rate
Top-ratedS4.E3 ∙ Driven to DistractionWed, Jan 17, 1990After two beautiful women are stabbed to death a month apart by the same killer, the only connection between the pair is their car dealership.8.1/10 (885)Rate
Top-ratedS4.E4 ∙ Masonic MysteriesWed, Jan 24, 1990Morse finds himself framed for murder by an unknown mastermind and suspended as Lewis is seconded to DCI Bottomley, who is in charge of the case.8.3/10 (1K)Rate