The Big Bang Theory (2007–2019)
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The Luminous Fish Effect 

Sheldon's mother is called to intervene when he delves into numerous obsessions after being fired for being disrespectful to his new boss.


Mark Cendrowski


Chuck Lorre (created by), Bill Prady (created by) | 4 more credits »

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Episode complete credited cast:
Johnny Galecki ... Leonard Hofstadter
Jim Parsons ... Sheldon Cooper
Kaley Cuoco ... Penny
Simon Helberg ... Howard Wolowitz
Kunal Nayyar ... Raj Koothrappali
Laurie Metcalf ... Mary Cooper
Mark Harelik ... Dr. Eric Gablehauser
Sierra Edwards ... Summer


Sheldon isn't looking forward to the faculty mixer where he will meet his new boss, Dr. Eric Gablehauser, who Sheldon doesn't respect. Due to an inappropriate comment to Gablehauser, Sheldon promptly gets fired. Sheldon has no interest in getting his job back. With his new found free time, Sheldon works on a series of rather meaningless experiments at home, which drive Leonard and Penny crazy. Feeling at the end of his rope in dealing with a crazed Sheldon, Leonard calls in the one person who he thinks can get Sheldon out of his funk: his mother. Mary Cooper, a religious southerner, deals with her son in her own special way, which may have a side benefit to herself. Written by Huggo

Plot Summary | Add Synopsis


Comedy | Romance


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English | Hawaiian

Release Date:

15 October 2007 (USA) See more »

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Did You Know?


Sheldon (Jim Parsons)'s idea that he could simply invents a time machine in the future, go back in time, and give it to himself, thereby eliminating the need to invent it, is impossible as this fact is would be a Predestination paradox. A physicist like Sheldon should already understand it, as he points to such in episode 1.14, The Big Bang Theory: The Nerdvana Annihilation (2008). See more »


The characters constantly refer to Gablehauser (Mark Harelik) as "Doctor Gabelhauser," implying he is a doctor. However during the scene where Mary (Laurie Metcalf) gets Sheldon (Jim Parsons) his job back on the door it says 'Professor Gablehauser' See more »


[first lines]
Sheldon: You know, I've been thinking about time travel again.
Leonard: Why? Did you hit a roadblock with invisibility?
Sheldon: Put it on the back burner. Anyway, it occurs to me, if I ever did perfect a time machine I would just go into the past and give it to myself, thus eliminating the need for me to invent it in the first place.
Leonard: Interesting.
Sheldon: Yeah, it really takes the pressure off.
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Crazy Credits

In the opening scroll of the time line when it gets to 91,000 there is a mistake the dates read 93,000BC 92,000BC 91,0009C 90,000BC for some reason 91,000 is a 9c not a BC. See more »


References Two and a Half Men (2003) See more »


History of Everything (Instrumental version)
Written by Barenaked Ladies
Performed by Barenaked Ladies
[Instrumental version of series theme song played over the closing credits]
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User Reviews

How not to handle stereotypes
29 November 2018 | by yatinsrivastavaSee all my reviews

I love Big Bang Theory,but till this episode Raj's character is simply kept as a comic relief,mostly harbouring on his Indian roots to evoke laughter. In this particular episode Raj denigerates Indian food and says some Victorian era stuff about Mumbai. Later in the episode,Sheldon's mom asks Raj whether chicken is one of the animals that they consider magical back in India (it doesn't even make any sense). The writers can surely do better than using these racial stereotypes for the sake of comic relief. Disappointed!!!

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