A lazy aristocrat invents the sandwich, the Romans host their own revolting cookery show, and William Shakespeare is haunted by the ghost of King Richard III.

The critically acclaimed historical comedy series concludes this week in true Horrible Histories style, with a selection of sketches packed with gore and toilet humour.

Roman Kitchen Nightmares examines the culinary tastes of the Romans, including tantalising dishes such as sheep's lungs mixed with rotten fish, and the programme also explores the communal delights of Roman lavatoriums.

Meanwhile, guts and gore from Victorian times are detailed in a sketch about life in Crimean hospitals before the arrival of Florence Nightingale, and the macabre carryings on of body snatchers Burke and Hare - who murdered people to sell their bodies to the Edinburgh physician Knox for dissection - are regaled in song.

Rounding off the programme, the last Pharaoh of Egypt is revealed in This is Your Reign; and the ghost of Richard III returns to question Shakespeare's artistic license and lack of historical accuracy.