![Leonard, you are my roommate,
my source of transportation...
Leonard, you are my roommate,
my source of transportation...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Leonard, you are my roommate,
my SOURCE of transportation...
The Big Bang Theory Season 2, Episode 13
![But not so deep as to introduce
a new source of friction. But not so deep as to introduce
a new source of friction.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
But not so deep as to introduce
a new SOURCE of friction."
The Big Bang Theory Season 2, Episode 5
![Not only do I have a deep-cycle
marine battery power source
Not only do I have a deep-cycle
marine battery power source](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Not only do I have a deep-cycle
marine battery power SOURCE
The Big Bang Theory Season 5, Episode 15
![as a source of information
as a source of information](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
as a SOURCE of information
The Big Bang Theory Season 11, Episode 16
![...competed
over the same food source...
...competed
over the same food source...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
...competed
over the same food SOURCE...
The Big Bang Theory Season 4, Episode 18