Time Team - Season 21 (2013)

Tony and the team attempt to help Hektor Rous, the son of 'Aussie Earl' Keith Rous, work out the mysterious history of the family's Tudor country home in Suffolk.

An ancient site that yields burials dating back to 2000BC, along with some rare Saxon brooches, beads, spears and jewelry is discovered on the army training ground on Salisbury Plain.

Tony and the team make their way to the Lake District on an expedition that takes them both higher and deeper than they've ever been before. They are looking for a forgotten piece of the nation's industrial heritage.

The team are at Oakham Castle, The best preserved 12th-century building in the country. There's more to it than meets the eye though as the walled area surrounding the castle is full of mysterious lumps and bumps waiting to be investigated.

In the 1960s, a young PhD student decided to excavate a South Oxfordshire field. He found a mosaic and the stone walls of what was clearly a Roman building. But he never found enough evidence to prove exactly what was there.

Tony and the team look for the remains of a renegade knight's Norman castle in one of Northern Ireland's most picturesque spots.

Tudor visitors remarked that it was grander than Hampton Court. But the palace went missing until the 1950s, when a group of pupils at Northwood School in Hertfordshire discovered its remains beneath their school playing field.

Steve and Pru fell in love with Upton Castle in Pembrokeshire and they had little idea what they had. Acres of overgrown gardens surrounded the building and looked like a medieval castle at the front and a Victorian mansion at the back.

Tony celebrates more than 150 practical experiments and re-creations that he and the team have taken part in over the last 20 years.

Tony takes a look back at the best bits from two decades and over 250 episodes.