Twenty-second narwhal

#22: Dalek. Today the narwhal is using his powers of disguise to infiltrate the enemy camp and gain information for the Doctor! He's got a good idea here, but has no idea where to find the Daleks or the Doctor. He feels, however, that if he rolls around for long enough in his wheelie-chair based disguise, he's bound to come across one of them sooner or later.