Look, here's the...
the PLANE ticket you bought me
The Big Bang Theory Season 7, Episode 6
That nut job was telling everybody
on the PLANE he's an astronaut.
The Big Bang Theory Season 6, Episode 4
and the shoes,
the PLANE tickets.
The Big Bang Theory Season 12, Episode 23
Rent a PLANE, write it in the sky.
The Big Bang Theory Season 9, Episode 12
If it's observed after it left the PLANE,
before it hits its target...
The Big Bang Theory Season 1, Episode 1