These series of QC talks intend to provide a privileged long-term (virtual) forum for the presentation and discussion of recent achievements and challenges regarding quantum computing. Although the series intends to be more focused on computer science aspects, it will also cover quantum computing engineering and technologies. The series will consist of talks given by leading scientists and researchers from academia, research labs, and industry, and intends to cover the wide spectrum of topics regarding quantum computing, from programming models and languages to technologies, and applications. We plan to organize the series in cycles, each consisting of 4 talks, likely 1 or 2 talks per month, and sporadically even including panel discussions. The anticipated target audience for the QCtalks includes members from academia, researchers and practitioners from labs and industry as well as university students.