For reasons undisclosed here due to their spoileristic nature, the fourth Doctor's regeneration was very nearly a failure. It did, however, manage to happen anyway, and the fifth Doctor was born. This one was the most human of the bunch. He was often very sensitive and treated his companions as equals rather than admirers, pets or followers. He was often lighthearted and took the show back to its roots in terms of complexity. The plots became simpler and less severe.
Peter Davison's Doctor was firmly against violence and often hesitated in disposing of his enemies as a result. This, of course, did not mean that he lacked courage. In fact, many fans say he was the bravest of the lot. This Doctor often took dangerous gambles in order to give even his enemies a chance to do the right thing. His most distinguishing feature was a stalk of celery he wore pinned to his lapel. When asked about it, the Doctor explained that celery turns purple in the presence of certain toxic gasses, as well as being an excellent restorative and good for his teeth.
