Guest Stars Grant Tremblay as Himself (Astrophysicist) Amber Straughn as Herself (Astrophysicist) Alex Filippenko as Himself (Astrophysicist) Chiara Mingarelli as Herself (Astrophysicist) Peter Galison as Himself (Astrophysicist) Sheperd S. Doeleman as Himself (Astronomer) Katie Bouman as Herself (Data Scientist)