- Debjani Bhaumik
- special thanks (3 episodes, 2017-2019)
- Jaimie Haysom
- special thanks (3 episodes, 2017-2019)
- Stein-Erik Rutledal
- special thanks (3 episodes, 2017-2019)
- Maarten van Bommel
- special thanks (2 episodes, 2018-2019)
- Robert K. Elder
- special thanks (1 episode, 2015)
- Kenneth E. Hall
- special thanks (1 episode, 2015)
- Alberto Ketchum
- special thanks (1 episode, 2018)
- Hideki Saijô
- in memory of (1 episode, 2018)
- Djamil Hariff
- special thanks (1 episode, 2019)
