The Big Bang Theory: Season 4, Episode 17

The Toast Derivation (24 Feb. 2011)

TV Episode  |  TV-14  |   |  Comedy
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Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.



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Episode complete credited cast:
Penny (as Kaley Cuoco)
Zack Johnson (as Brian Thomas Smith)


It's Thursday night, which in Sheldon's world means that the guys are coming over for pizza. However, Leonard informs him that he's going over to Raj's to hang out with Priya, with Howard most-likely being there as well, so Sheldon is more than welcome to come along. Sheldon does go, but it's just not the same. But what bothers him more is what Amy tells him the night signifies: that Leonard is the nucleus of their group, not him. To prove Amy wrong, Sheldon, on the next night that Leonard says he's hanging out with Priya, Raj and Howard at Raj's place, plans a gathering of his own at their apartment with his new group of mismatched "friends": Stuart from the comic book store, Penny's old boyfriend Zack, and Barry Kripke (with LeVar Burton a probable no show, although Sheldon did tweet him about the gathering). Will either the group at Raj's or the group at Sheldon's have a good time? Meanwhile, Amy and Bernadette take Penny out for a night on the town to make her forget that Priya ... Written by Huggo

Plot Summary | Plot Synopsis




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Release Date:

24 February 2011 (USA)  »

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Aspect Ratio:

16:9 HD
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Did You Know?


The title refers to the origination of the word "Toast". See more »


When Bernadette says, "I would take that deal all day long!", she is playing with her hair, and her feet are crossed and jiggling. It then cuts to a different angle, and her hands are still and her feet are in a different position. See more »


Penny: Let's go through this one more time. Just because Leonard has a new girlfriend does not mean I need to go out and hook up with some guy.
Bernadette Rostenkowski: But you could if you wanted to, right?
Penny: Well yeah, I guess.
Bernadette Rostenkowski: Pick out the hottest guy in the room, take him home, do unspeakable things to him, then kick him to the curb with a smile on his face and teeth marks on his heinie?
See more »

Crazy Credits


CENSORED! See more »


References Star Trek: The Next Generation (1987) See more »


Walking on Sunshine
Written by Kimberley Rew
Performed by John Ross Bowie, Brian Smith, and Kevin Sussman
See more »

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User Reviews

Clap clap Jim Parsons
16 March 2011 | by (Joinville, Brazil) – See all my reviews

This episode begins with Sheldon finding out he's not the center of his group of friends anymore. So once he notices that, he plans to invite some new friends to show the geeks he doesn't need them. As provided, it doesn't work well, since they hate Sheldon's speeches and begin to play karaoke. In Penny's apartment, she, Amy and Bernadette plan to go out and kiss some guys. In these scenes there are many appealing jokes that it's impossible not to laugh, while we feel Amy is losing her geek mind.

Overall, in this episode Sheldon steals the show as usual and has most of all the funny jokes. It's great to notice that the writers are varying the characters and showing us that they're all very talented. Jim Parsons is an extremely good actor and proves it here once again.

5 of 5 people found this review helpful.  Was this review helpful to you?

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