Dinosaur is the 403rd episode of The Bill.
Following another unsuccessful raid looking for proceeds of the DIY warehouse robbery, D.I. Burnside's unorthodox policing methods, which include flushing an informant's head down a toilet, set him on a collision course with D.C.I. Reid, who has already received several complaints about Sun Hill officers. Reid fears the worst when she is called in to Scotland Yard for an urgent meeting with MS15.