Do you know the original purpose
of the APPENDIX, Leonard?
The Big Bang Theory Season 4, Episode 2
...I am betrayed by my APPENDIX,
a vestigial organ.
The Big Bang Theory Season 4, Episode 2
...in Appendix C: Future Commitments.
Number 37:
The Big Bang Theory Season 3, Episode 15
Ever had your APPENDIX out?
The Big Bang Theory Season 4, Episode 2
that they go in an APPENDIX
at the end.
The Big Bang Theory Season 12, Episode 9