Firefly did a movie to wrap things up.
The Big Bang Theory Season 6, Episode 21
♪ I'd be Firefly, Buffy and
Avengers without Joss Whedon ♪
The Big Bang Theory Season 7, Episode 6
Kind of like when
Firefly was cancelled.
The Big Bang Theory Season 7, Episode 17
He begged the Fox network
not to cancel Firefly.
The Big Bang Theory Season 5, Episode 21
He owns Fox
and they cancelled Firefly.
The Big Bang Theory Season 3, Episode 15