Penny

Kaley Cuoco

Leonard Hofstadter

Johnny Galecki

Sheldon Cooper

Jim Parsons

Howard Wolowitz

Simon Helberg

Raj Koothrappali

Kunal Nayyar

Bernadette Rostenkowski

Melissa Rauch

Amy Farrah Fowler

Mayim Bialik

Mike Rostenkowski

Casey Sander

Dry Cleaner

William Stanford Davis

Stuart Bloom

Kevin Sussman

Lucy

Kate Micucci

Janine Davis

Regina King

Wil Wheaton

Wil Wheaton

Arthur Jeffries

Bob Newhart

Santa

Dakin Matthews

Debbie Wolowitz (voice)

Carol Ann Susi

Bert Kibbler

Brian Posehn

Buzz Aldrin

Buzz Aldrin

Lana

Angela Sargeant

Dimitri

Pasha Lychnikoff

Alex Jensen

Margo Harshman

LeVar Burton

LeVar Burton

Barry Kripke

John Ross Bowie

Waiter

David Trice

Stephen Hawking

Stephen Hawking

Mrs. Rostenkowski

Meagen Fay

Paramedic

Ian Reed Kesler

Cole

Ryan Cartwright

Mike Massimino

Mike Massimino

Paramedic

Troy Winbush

Girl 1

Piper Mackenzie Harris

Dale

Josh Brener

Officer Reynolds

Matt Battaglia

Claire

Janelle Marra

Tom

Riccardo LeBron

Steven V. Silver

Car Thief 1

Craig Gellis

Girl 2

Diamond White

Mark Cendrowski

Lillian

Jan Hoag

Car Thief 2

Frank Alvarez

Emily Sweeney

Laura Spencer

Gretchen

Briana Cuoco

Justin

Dawson Fletcher

Dr. Schneider

Ken Lerner

Guy

Rick Gifford

Chauffeur

John Mendoza

V.M. Koothrappali

Brian George

Chuck Lorre

Beverly Hofstadter

Christine Baranski

Kristy Cecil

Bill Prady

Mary Cooper

Laurie Metcalf

President Siebert

Joshua Malina

Peter Chakos

Priya Koothrappali

Aarti Mann

Steven Molaro

Zack Johnson

Brian Thomas Smith

Halley Wolowitz (voice)

Pamela Adlon

Maria Ferrari

Leslie Winkle

Sara Gilbert

Anu

Rati Gupta

David Goetsch

Denise

Lauren Lapkus

Richard Williams

Dean Norris

Michael J. Massimino

Michael J. Massimino

Faye Oshima Belyeu

Mary T. Quigley

Claire

Alessandra Torresani

Althea

Vernee Watson-Johnson

Eric Gablehauser

Mark Harelik

Iris Bahr

Announcer (voice) / Man / Lecturer (voice)

Ed Lieberman

Wyatt Teller

Keith Carradine