5-11 September 2021: Francesca Fedele (Universities of Verona and Padua)

17-23 October 2021: Esther Banaian (University of Minnesota)

22 October-4 November 2021: Raphael Bennett-Tennenhaus (Universität Bielefeld)

2 March-1 August 2022:  Azadeh Mehregan (University of Isfahan)

7-15 May 2022:  Paul Smith (University of Washington)

8-14 May 2022:  Mads Hustad Sandøy (Norwegian University of Science and Technology)

11-17 May 2022:  Job Rock (Ghent University)

16-27 May 2022:  Aran Tattar (University of Cologne)

6-17 June 2022:  Martin Kalck (University of Freiburg)

3 July-1 August 2022: Javad Asadollahi (University of Isfahan)

11-22 July 2022: Yadira Valdivieso (Universidad de las Américas Puebla)

19-28 July 2022: David Pauksztello (University of Lancaster)

12-20 October 2022: Nicholas Williams (University of Lancaster)

12 October-25 November 2022: Johanne Haugland (Norwegian University of Science and Technology)

11 November 2022: Lars Winther Christensen (Texas Tech University)

20-27 November 2022: Matt Booth (University of Lancaster)