[plug] removing packages

[Jason]

Greetings everyone,

Last night I was playing around on my system, and wanted to install an 
app called ktorrent.

I had to install KDE to get it to work and when I did, apt-get installed 
about 100 or so packages as well as KDE.

In the end, I didn't really like ktorrent and now want to remove all of 
those applications that were installed upon doing apt-get install kde.

If I do apt-get remove kde, it only wants to get rid of "kde", nothing 
else.

How can I have apt remove the packages it installed without working out 
a manual list?

Regards,

Jason.