Innocent Bystander in Opening Action Sequence (uncredited)
Joe Spano
Mitch, Robber (uncredited)
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Trivia
Clint Eastwood was originally going to direct this film himself. After taking over as director of The Outlaw Josey Wales (1976) though, he found himself having to supervise the edit of that film and lacked time to fully prepare himself to both act and direct in another film so soon. He therefore promoted James Fargo, who would have been this film's assistant director, to full director. Eastwood would instead direct the next Dirty Harry film, Sudden Impact (1983).
The scenes from the squad room where Harry drops the dynamite bomb, is identical to the squad room used in the series The Streets of San Francisco which ran at the time of filming this picture.
During the firearms heist (known as Hamilton Firearms in the film) in a warehouse dock, the firearms heisted are real-life infantry weapons in service with the United States armed forces. The firearms include M16A1 assault rifles, Armalite AR18 assault rifles (the AR18 was not adopted as a standard service assault rifle - it was later adopted by the Provisional IRA in Northern Ireland - the villain Tex is seen firing an AR18 during the Alcatraz shootout), and the M72 anti-tank missile, known as the Light Anti-Tank Weapon; in the film, the M72 was called the LAW Rocket. Both the M16A1 and the M72 were used in the Vietnam War.
When Harry chases Henry Lee on the roofs we can briefly see one person (very likely one of the crew) standing on another roof on the background. When Harry reaches the same point the person is gone.
When the terrorists stop the mayors car by blowing out the right rear tire with machine gun fire, the terrorists were on the left rear side of the car.
When Harry finds the old ladies in the sex parlour they are copywriting a message on a board. Everything is in broken English except the perfectly placed possessive apostrophe in "customers' items" at the end of the message.
Is Albert Popwell's character the same as in Dirty Harry?
A
It is possible, he seems familar to Harry and he says he knows him, he could be the robber shot outside the bank. This would mean that he only served 5 years for armed robbery (and possibly attemped murder for opening fire on Harry) but given the state of the justice system in Harry's world it is not unfeasible.
Q
How many Dirty Harry movies are there?
A
There are five: Dirty Harry (1971); Magnum Force (1973); The Enforcer (1976); Sudden Impact (1983); The Dead Pool (1988).