Too Rich for My Blood ( short story ) Too Rich for My Blood was the seventh short story in the Short Trips anthology " " . It was written by Rebecca Levene . It featured the Seventh Doctor , Chris Cwej and Bernice Summerfield . Summary . The Doctor has taken his friends to Las Vegas . They enter a casino that looks like a spaceship , and Benny heads off to play a game of poker . Chris wants to watch a hot dog - eating contest . Chris finds the contest in the atrium , and makes his way to the front . He sees that one of the contestants , whose name is Jimmy Lilly , is very skinny , and Chris doubts he will do well until a man named Tom suggests putting his money on Lilly . Bernice is playing a hand against a woman named Vivienne Jones . Vivienne is low on chips , and goes all in . To make up the pot , she adds an entry ticket for " the big game upstairs " . The Doctor wanders the casino and eventually follows a couple of waitresses . When they reach the changing room , they change out of their costumes and the Doctor sees they are aliens . Benny , having won the pot against Vivienne , is escorted upstairs to the big game . She can tell they are playing for big stakes , and not only is she nervous , but the other seven are nervous too . Four casino guards watch the players . The contest starts , and Lilly quickly eats his hot dogs and asks for more . When all the hot dogs are gone , he takes hot dogs from the other contestants , and when those run out , he bites off the hand of the man next to him . Bernice isn ' t doing so well . She has been playing cautiously , and has been slowly losing chips . She and the other players are playing like this game is the " most important game of their lives " . At first Chris attempts to help the man bit by Lilly , but then that man turns and bites the man next to him . Chris and several others decide to run , but the door is locked . Those who are closest to the deranged contestants are caught , but Chris and the others find a corridor and head out . The Doctor watches these events on a security screen , and hits the button to lock the casino doors . He can ' t let whatever this is out onto the streets . Chris ' group heads for the main floor of the casino , and they try to convince the slot machine players to leave . However , they have little success , and soon their pursuers arrive . Chris and his party of fifty people keep running , and the pursuers stop to attack the slot machine players . The Doctor finds the nerve centre of the casino and enters . Inside , several aliens are eating . The Doctor tells them they must take their casino spaceship and leave before anyone else gets infected with their disease . They don ' t know what he ' s talking about . The casino really is a casino . Benny goes all - in against Joan , who also goes all - in . Benny wins the hand , and Joan is taken away by one of the guards . The aliens explain to the Doctor that they had crashed on Earth long ago , and decided to stay . They started a casino , but they had to design a serum for themselves to survive in Earth ' s atmosphere . They have prospered here in Las Vegas . Chris and the others put some distance between themselves and their pursuers when their pursuers stop to eat at the buffet . Chris notices that the " infected " people have metabolisms hundreds of times that of a normal human . When they can ' t eat , they eat themselves up from the inside . Chris learns from Tom that Lilly was given a serum of something to fix the competition . They got the serum from someone who needed some money to pay for entry into the big poker game . Benny and a man named Chuck are the only players left . Chris and his eight fellow survivors hide in the freezer . The Doctor and the aliens figure out that some of their serum was taken and given to the humans . Meanwhile , Benny learns that the prize for winning the big game is to stay alive . When she wins , she learns that Chuck is an alien . He sold serum to Tom for money to enter the big game . Since Chuck ' s life is now forfeit , the Doctor has a suggestion . The enzymes in Chuck ' s body can cure the infection , so he is sent to the location of the remaining infected humans . As they devour him , they begin to recover , and soon the infected are dazed and confused . The aliens have memory - erasing technology , which they will use on the survivors . Chris ' group emerges from the freezer to find the fight is over . Continuity . " to be added "