Penny

Kaley Cuoco

Leonard Hofstadter

Johnny Galecki

Sheldon Cooper

Jim Parsons

Howard Wolowitz

Simon Helberg

Raj Koothrappali

Kunal Nayyar

Amy Farrah Fowler

Mayim Bialik

Bernadette Rostenkowski

Melissa Rauch

Priya Koothrappali

Aarti Mann

Debbie Wolowitz (voice)

Carol Ann Susi

President Siebert

Joshua Malina

Dr. V.M. Koothrappali

Brian George

Barry Kripke

John Ross Bowie

Jimmy Speckerman

Lance Barber

Stuart Bloom

Kevin Sussman

Reverend White

Jim Turner

Mary Cooper

Laurie Metcalf

Kevin

Blake Berris

Dr. Beverly Hofstadter

Christine Baranski

Sandy

Stacey Travis

Mike Rostenkowski

Casey Sander

Althea

Vernee Watson

Jimmy

Karl T. Wright

Mrs. Koothrappali

Alice Amter

Jonathan

Jonathan Schmock

Stephen Hawking

Stephen Hawking

Siri

Becky O'Donohue

Laura

Ashley Austin Morris

Dale

Josh Brener

Sandy

Stacey Travis

Phil

Nick Clifford

Alice

Courtney Ford

Dave Roeger

Robert Clotworthy

Emily

Katie Leclerc

Lakshmi Choudry

Chriselle Almeida

Aaron

Jadon Sand

Professor Rothman

Lynn Philip Seibel

Wil Wheaton

Wil Wheaton

Mike Massimino

Mike Massimino

Angelo

Peter Onorati

Mr. Spock

Leonard Nimoy

Brent Spiner

Brent Spiner

Dimitri

Pasha Lychnikoff

Jeremy

Dusan Brown

Bert Kibbler

Brian Posehn

Zack Johnson

Brian Thomas Smith

Halley Wolowitz (voice)

Pamela Adlon

Anu

Rati Gupta

Denise

Lauren Lapkus

Richard Williams

Dean Norris

Michael J. Massimino

Michael J. Massimino

Janine Davis

Regina King

Steven V. Silver

Arthur Jeffries

Bob Newhart

Mark Cendrowski

Claire

Alessandra Torresani

Eric Gablehauser

Mark Harelik

Announcer (voice) / Man / Man V.O. (voice)

Ed Lieberman

Chuck Lorre

Maria Ferrari

Wyatt Teller

Keith Carradine

Bill Prady

Steven Molaro

Faye Oshima Belyeu

Iris Bahr

Sara Gilbert

Director

Joel Murray

Director

Mark Cendrowski

Director

Ted Wass

Director

Anthony Rich

Director

James Burrows