TV series example of the word

The Big Bang Theory Season 3, Episode 11
...known as Sheldon Alpha Five.

The Big Bang Theory Season 8, Episode 21
<i>Just turn left at Alpha Centauri, you can't miss it.</i>

The Big Bang Theory Season 1, Episode 6
In the information age, Sheldon, you and I are the alpha males.

The Big Bang Theory Season 5, Episode 14
Well, technically, this would be an alpha test.

The Big Bang Theory Season 12, Episode 18
could cause time variation of alpha E.M.?