Hawaii Five-O (1968 TV series) season 11

After a government agent is murdered, McGarrett must identify the traitor in a scientific facility.

Guest stars: Andrew Duggan and Steve Kanaly.

When an astrologer visits McGarrett to inform him of a murderer with a terrible temper, his antagonism lessens when her assumptions seem to be partly true.

Guest stars: Tab Hunter and Samantha Eggar.

While McGarrett follows a false lead, an undercover Danno is discovered and brainwashed to carry out the assassination of McGarrett.

Guest stars: Stephen Elliott and Irene Yah-Ling Sun.

McGarrett is the lone hold-out in a trial where the guilt of the accused seems certain.

Guest stars: Janis Paige, Lou Richards and Eugene Lion.

Hired by a crime-syndicate chieftain, a jet-setter and his girlfriend (Zohra Lampert) scheme to discredit McGarrett.

Guest stars: Zohra Lampert and Richard Romanus.

Danny goes undercover in a neo-Nazi organization to investigate a violent hate campaign directed against a congressional hopeful.

Guest star: James Olson

When a street robber claims that he stole King Tutankhamen's mask for fun, McGarrett suspects there is more to the case than simple robbery.

Guest stars: Cyd Charisse, Rory Calhoun, Tim Thomerson and Robert Ellenstein.

NOTE: Laura Sode-Matteson begins her regular series appearance as McGarrett's secretary, Luana.

McGarrett engineers a convict's escape so he can rejoin his gang and provide information about their activities.

Guest stars: Brian Tochi and Dane Clark.

Danno is stunned to learn that a former flame is apparently a shoplifter and a fugitive's girlfriend.

Guest stars: Katherine Cannon and Burr DeBenning.

The death of a prominent politician reveals a strange love triangle.

Guest star: Sharon Farrell.

An evangelist is assaulted by a man who claims the preacher is responsible for his wife's death.

Guest star: Keith Baxter, James Sikking and Jean Marsh.

A local mobster's plans to acquire a nightclub include murdering its mainland mob partner.

Guest stars: James Darren, Yvonne Elliman, Ross Martin, Nehemiah Persoff, Antony Ponzini, Richard Dimitri and Brian Tochi.

NOTE: First appearance of the character Tony Alika (Ross Martin).

When a robbed bank vault shows no signs of break-in, an inside job seems the likely solution. McGarrett's trail of clues leads him back to the builder of the vault and his wife.

Guest stars: Robert Reed and Barbara Anderson.

Millicent Shand returns and claims that her niece's husband has faked his own death in order to get his hands on $500,000.

Guest stars: Mildred Natwick, Robert Vaughn, Eduard Franz and Diana Scarwid.

A vacationing heiress seems unconcerned when McGarrett warns her that someone is after her ruby.

Guest stars: Tricia O'Neil, John Saxon and Nita Talbot.

A shady photographer becomes involved with gangsters.

Guest stars: Paul Williams, Sandra Kerns, Ross Martin and Robert Clarke.

A private detective is rescuing girls from prostitution, and using the opportunity to kill the pimps as well.

Guest stars: Robert Loggia, John Larch and Kaki Hunter.

McGarrett must protect a physician (Fritz Weaver) suspected of drug peddling from a grieving father (Cameron Mitchell) whose son died of a drug overdose.

McGarrett and a profit-seeking writer (Charles Cioffi) compete to find a maniacal killer.

An Asian dies on a flight from Bangkok to Honolulu when a bag of heroin in her stomach bursts; the trail leads McGarrett and Danny to a Singapore drug ring. Barry Bostwick, Victoria Principal and George Lazenby guest star.

NOTE: This feature-length episode was later shown in two parts in syndication (it was also produced early in the season - in fact, it was filmed before the season premiere - but held back).