Cast (5)

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Sheldon Cooper

Kaley Cuoco

Penny

Simon Helberg

Howard Wolowitz

Kunal Nayyar

Rajesh Koothrappali

Crew (6)

Directing

Mark Cendrowski

Director

Writing

Chuck Lorre

Story

Steven Molaro

Teleplay

Bill Prady

Teleplay

Lee Aronsohn

Story

Production

Mea Ybarra

Associate Producer

Guest stars (3)

Kevin Sussman

Stuart Bloom

Travis Davis

Ground Controller (voice)

Robert Clotworthy

Astronaut (voice)