Murder is a Taxing affair is the 6th episode of Season 6 in the original version of Hawaii Five-O
Synopsis[]
16 Oct. 1973 Murder Is a Taxing Affair A rogue IRS agent on the trail of a tax evader catches him in an airplane lavatory - and strangles him. The agent's real motive for the murder was to find and keep $600,000 the dead man was carrying in a suitcase. Then the suitcase is mistakenly picked up at Honolulu Airport by a flight attendant. The agent tracks her down and murders her as well, but once again it's the wrong suitcase. Two mainland tourists have the money and the IRS agent - who has joined Five-O as a special agent on the trail of the hot money - uses the police resources to go after them.