John Wayne plays the titular character McQ, a tough and determined cop who sets out to solve a case involving corruption and murder.
Eddie Albert portrays Kosterman, a shady and suspicious character who becomes entangled in the investigation led by McQ.
Diana Muldaur takes on the role of Lois, a character who plays a key part in the unfolding events of the crime drama.
Colleen Dewhurst plays the character Myra, bringing depth and intrigue to the narrative as the story progresses.
Clu Gulager portrays Toms, a character who adds layers of complexity to the plot of McQ through his actions and interactions.
David Huddleston embodies the character Pinky, adding a unique dynamic to the ensemble cast of McQ.
Julian Christopher takes on the role of J.C., a character with a pivotal role in the unfolding events of McQ.
Al Lettieri portrays Santiago, a character whose actions and motives contribute to the suspense and drama of McQ.
Julie Adams plays Elaine, a character who adds layers of intrigue and emotion to the storyline of McQ.
Roger E. Mosley brings depth to the character of Rosey, contributing to the overall atmosphere and tension of McQ.
William Bryant portrays Stan Boyle, a character who plays a vital role in the unfolding events of the crime drama McQ.
Richard Kelton takes on the character Radical, adding a unique perspective to the narrative of McQ.
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