Guest Stars Andrew Rannells voices Matthew MacDell Richard Kind voices Marty Glouberman Paula Pell voices Barbara Glouberman Thandiwe Newton voices Mona Seth Morris voices Greg Glaser Chelsea Peretti voices Monica Foreman-Greenwald Brian Tyree Henry voices Elijah Nathan Fillion voices Nathan Fillion Chris O'Dowd voices Flanny O'Lympic Jenny Slate voices Caitlin Grafton Cole Escola voices Montel Peter Capaldi voices Seamus McGregor Ashley London voices Additional Voices Joe Wengert voices Additional Voices Jon Daly voices Nathan's Director Brian Tyree Henry voices Chief