• Special Guest Star: Kunal Nayyar (Rajesh "Raj" Koothrappali)
• Special Appearance By: Penn & Teller (Themselves)
• Guest Starring: Ryan Cartwright (Kyle), Josh Brener (Trevor), Rich Ting (Soldier #1), Tommy Walker (Gary), Anthony Alabi (Soldier #2)
• Co-Starring: Atticus Batacan (Floss Vendor)
• Written By: Chuck Lorre & Zak Penn & Bill Prady
• Directed By: Kyle Newacheck

• Special Guest Star: Kaley Cuoco (Penny)
• Special Appearance By: Christine Baranski (Herself)
• Guest Starring: Ryan Cartwright (Kyle), Josh Brener (Trevor), Riki Lindhome (Ramona Nowitzki), Brian Thomas Smith (Zack Johnson), Tommy Walker (Gary), Brandon Morales (Officer McCaffrey), Joe Williamson (Officer Steve Denison), Matty Cardarople (Keith)
• Written By: Chuck Lorre & Zak Penn & Bill Prady
• Directed By: Kyle Newacheck

• Special Guest Star: Melissa Rauch (Bernadette Rostenkowski)
• Special Appearance By: Wil Wheaton (Himself)
• Guest Starring: Louis Mustillo (Alexa), Tommy Walker (Gary), Matty Cardarople (Keith), Marieve Herington (Acolyte), Kassie Hight (Acolyte), David Salsa (Barman), Payam Banifaz (Acolyte), Doug Simpson (Abramowitz the Grey), Stacie Greenwell (Nurse Stephanie)
• Co-Starring: Samantha Neyland Trumbo (Lisa), Kikéy Castillo (Suzanne)
• Written By: Chuck Lorre & Zak Penn & Bill Prady
• Directed By: Kyle Newacheck

• Special Guest Star: Mayim Bialik (Amy Farrah Fowler)
• Special Appearance By: Jon Cryer (Sherpa), "Weird Al" Yankovic (Himself)
• Guest Starring: Ryan Cartwright (Kyle), Josh Brener (Trevor), Charlie Barnett (Simpa), Zoe Cipres (Chana), Tommy Walker (Gary), Stacie Greenwell (Nurse Stephanie)
• Co-Starring: Kolby Alderson (Jaden), Violette Linnz (Talia), Jeff Wolfe (Orderly #1), Sala Baker (Orderly #2)
• Written By: Chuck Lorre & Zak Penn & Bill Prady
• Directed By: Kyle Newacheck

• Guest Starring: Charlie Barnett (Simpa), Zoe Cipres (Chana), Tommy Martinez (Gavel), Brandon Sutton (Shoe Guy), Vinessa Vidotto (Woman Who Questions Kripke), Rachelle Goulding (Alta)
• Co-Starring: Jascha Charron (Xena), Lily Cardone (Lina), Jackie R. Jacobson (Karni), Gaston Brouet (Lumpa)
• Written By: Chuck Lorre & Zak Penn & Bill Prady
• Directed By: Jonathan Frakes

• Special Guest Star: Kunal Nayyar (Rajesh "Raj" Koothrappali)
• Guest Starring: Ryan Cartwright (Kyle), Josh Brener (Trevor), Tommy Walker (Gary), John Mariano (Giorgio)
• Co-Starring: Alan Aymie (Carl)
• Written By: Chuck Lorre & Zak Penn & Bill Prady
• Directed By: Jonathan Frakes

• Special Guest Star: Melissa Rauch (Bernadette Rostenkowski)
• Special Appearance By: Neil deGrasse Tyson (Himself)
• Guest Starring: Riki Lindhome (Ramona Nowitzki)
• Co-Starring: Brooklyn Rose (Rebecca), Harley Bronwyn (Cassandra), Brooklyn Jaramillo (Girl #1), Mila Jaymes (Girl #2), Sofia Grey (Girl #3)
• Written By: Chuck Lorre & Zak Penn & Bill Prady
• Directed By: Kyle Newacheck

• Special Guest Star: Kaley Cuoco (Penny)
• Guest Starring: Ryan Cartwright (Kyle), Josh Brener (Trevor), Joshua Malina (Captain Siebert), Jonathan Adams (General Adams), Tommy Walker (Gary), Anthony Alabi (Sergeant), Eltony Williams (Keith), Omar Moustafa Ghonim (MP Smith)
• And: Dean Norris (Captain Richard Williams)
• Co-Starring: Jaylen Eichler (PFC Collins), André Sogliuzzo (The Adversary)
• Written By: Chuck Lorre & Zak Penn & Bill Prady
• Directed By: Kyle Newacheck

• Special Guest Star: Mayim Bialik (Amy Farrah Fowler)
• Guest Starring: Ryan Cartwright (Kyle), Josh Brener (Trevor), Riki Lindhome (Ramona Nowitzki), Andy Ridings (Jay Garrick aka The Flash), Eric Allan Kramer (Mr. Freeze), Tommy Walker (Gary)
• Co-Starring: André Sogliuzzo (The Adversary)
• Written By: Chuck Lorre & Zak Penn & Bill Prady
• Directed By: Robert Duncan McNeill

• Guest Starring: Ryan Cartwright (Kyle), Mark Sweet (Himself)
• Co-Starring: André Sogliuzzo (The Adversary)
• Written By: Chuck Lorre & Zak Penn & Bill Prady
• Directed By: Robert Duncan McNeill