Not sure about the ancient content in these, but they look interesting:

4.00 p.m. |DISCC| Superweapons of the Ancient World: The Ram
The team, including top military engineers from the U.S. military academy at West Point, re-creates a Roman tortoise ram and tests it by trying to demolish a specially re-created replica of an ancient six-metre-high, 3.5-metre-thick city wall.

5.00 p.m. |DISCC| Superweapons of the Ancient World: The City Destroyer
The early fourth century saw the creation of a mobile armour-plated siege tower armed with the world's first catapults; this team of builders must re-create a 12-metre-high "City Destroyer"; will they get the job done and defeat a local "enemy"?

DISCC = Discovery Channel (Canada)