"Three O'Clock in the Morning" is a lesser-known gem from Dexter Gordon's 1962 Blue Note album Go!, featuring Julian Robledo's composition reimagined as a medium-tempo jazz vehicle. Set in a 32-bar ABAC form in F at approximately 145 bpm, the tune swings with an easy, loping feel that brings out the best in Gordon's relaxed rhythmic conception. His three-chorus tenor saxophone solo is a marvel of melodic invention, with long, singing phrases that seem to float above the rhythm section's steady pulse. Pianist Sonny Clark follows with a single chorus that complements Gordon's spacious approach with more rhythmically compact ideas. The medium tempo provides an ideal showcase for Gordon's signature behind-the-beat phrasing, a rhythmic approach that gave his playing its distinctive sense of unhurried authority. Gordon's choice to include this relatively obscure tune on Go! demonstrates his wide-ranging musical knowledge and his ability to find jazz potential in unexpected material. The performance exemplifies the relaxed mastery that characterized Gordon's playing throughout this landmark album, one of the defining statements of the hard bop tenor saxophone tradition.