I'll try this but I warn you it might not be funny
Rose:um... doctor what are you doing?
doctor:I'm examining this chip to see if it's a crilitane or a slitheen. I can't tell from first glance
sarah:um... doctor what are you doing?
doctor:I'm trying to figure out wether this is a crilitane or a slitheen but then again it could be a human thats been genetically altered by nano-bots
K-9:master... what are you doing?
doctor:I'm trying to figure out wether this is a crilitane or a slitheen but then again it could be a human thats been genetically altered by nano-bots... but then again it could be a dalek experiment that went horribly wrong... what do you think*passes to K-9*
K-9:processing... processing... processing complete. Subject is chip inhabitted by human named Cassandra
doctor
surprised h thats alright then *eats chip*... oh goodness I'm a man