Drawn on the sociocultural paradigm, I examined teacher-student communication with emphasis on teacher's talk and its role on international students' learning English as a Second Language in an English for Academic Purposes classroom in a global campus in the U.S. Developmental data analyses of class observations, teacher and student interviews, and documents led to finding multidimensional characteristics of Critical Teacher Talk (CTT). I also found evidence of the role of CTT on production-process-affective aspects of learning English as an International Language. The findings further shed insights on the need to train and practice Critical International Language Pedagogy with the triadic principles--transnational culture building, critical caring, and authentic learning--among international higher education educators and teacher-educators.