Plot: As Howard worries about fatherhood, he and Sheldon bond when they jointly assemble a model rocket. Meanwhile, Penny bonds with Leonard's mother, Beverly, much to his concern
Cast
Johnny GaleckiLeonard HofstadterJohnny Galecki was 42 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Wed, Apr 30 1975
Jim ParsonsSheldon CooperJim Parsons was 44 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Sat, Mar 24 1973
Kaley CuocoPennyKaley Cuoco was 31 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Sat, Nov 30 1985
Simon HelbergHoward WolowitzSimon Helberg was 36 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Tue, Dec 09 1980
Kunal NayyarRajesh KoothrappaliKunal Nayyar was 36 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Thu, Apr 30 1981
Melissa RauchBernadette RostenkowskiMelissa Rauch was 37 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Mon, Jun 23 1980
Mayim BialikAmy Farrah FowlerMayim Bialik was 41 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Fri, Dec 12 1975
Dana L. WilsonDr. SandersDana L. Wilson was >> in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Unknown Birthday
Michael Patrick McGillPolice OfficerMichael Patrick McGill was 44 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Mon, Jul 02 1973
Christine BaranskiBeverly HofstadterChristine Baranski was 65 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Fri, May 02 1952
Crew
Mark CendrowskiDirectorMark Cendrowski was >> in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Unknown Birthday
Maria FerrariStoryMaria Ferrari was >> in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Unknown Birthday
Eric KaplanTeleplayEric Kaplan was 46 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Fri, Sep 10 1971
Bill PradyStoryBill Prady was 57 in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Tue, Jun 07 1960
Tara HernandezStoryTara Hernandez was >> in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Unknown Birthday
Steven MolaroTeleplaySteven Molaro was >> in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Unknown Birthday
Jeremy HoweTeleplayJeremy Howe was >> in The Big Bang Theory - Season 11 - The Explosion Implosion (Episode 4).
Birthday: Unknown Birthday