Kathryn Elise Drexler/Chris Bartlett as Teacher Droid – Kathryn Elise Drexler provided the voice for the Teacher Droid, with Chris Bartlett physically playing her. Drexler is a post-production coordinator at Lucasfilm, while Bartlett previously performed the actions for Zero the Droid in The Mandalorian.
Ryan Powers as Alien Worker – Ryan Powers play the alien mechanic who planted the tracking device on the Razor Crest. He’s appeared in Agents of S.H.I.E.L.D. and How I Met Your Mother.
Daniel Negrete as School Kid – Baby Yoda’s school classmate is portrayed by Daniel Negrete
Morgan Benoit as Imperial Security Officer – Morgan Benoit takes the role of the Imperial base’s security official. The actor has been in Lucifer and Castle.
Paul Sun-Hyung Lee as Captain Carson Teva – After his debut in The Mandalorian season 2, episode 2, X-wing pilot Paul Sun-Hyung Lee returns as Captain Carson Teva. The Korean-Canadian actor is best known for his in Kim’s Convenience
Katy O’Brian As Comms Officer – Katy O’Brian delivers the information about Din to Moff Gideon. She’s been in Black Lightning and Westworld.
Originally from https://screenrant.com/mandalorian-season-2-episode-4-cast-cameos-characters/