Mellotronists

In a message dated 10/11/02 5:46:19 AM, wy-mar-ren@... writes:

>And It showed up in a John Pertwee Doctor Who Episode, as well.
>   Phil

Any idea which Jon Pertwee Doctor Who episode it was?  As a Doctor Who fan, I 
must know and check it out.
                                        Bill "the Doctor" Rudloff