What links a disintegrating spaceship to a posh garden party where a wealthy couple are celebrating their love for each other in style? Gatecrashers the Doctor and Lucie think they know the answer. But they're not the only uninvited guests - ferocious alien warriors riding pterodactyl-like Vortisaurs are about to make their entrance! Featuring the song 'Bucimeana', sung by Julia McKenzie, with music by Tim Sutton and lyrics by Paul Sutton from a traditional Hungarian poem.