The Raxacoricofallapatorian delegate, as the Doctor put it, was big and green with long sharp claws - not the sort of alien you'd usually find at a peace meeting. It seems chatty enough - talking to you about the prices of food and oil these days what with the war on.

Speak to the Ood Prime Minister
Debate with the Grame of Balhoon

Consult the Uvodni Governor

Converse with the Judoon Captain

Chat to the Face of Boe

Meet the Sycorax

Tattle with the Zygon High Council

Don't speak to any more aliens