"The trek in itself is very interesting, looking at what each of the individuals involved were like, finding out more about their personalities.
"But, while expressing himself through me, Guy Fawkes revealed that the one who betrayed him to the king was not Francis Tresham as was previously believed," he adds.
So who sent the anonymous letter that led to Fawkes' arrest?
"In fact, it was someone very close to Fawkes, one of his plotters. So I'm told - because I don't know what people have said until I'm told afterwards - that I solved a mystery."
Derek has obviously been a little busy of late.
For Derek Acorah's Quest For Guy Fawkes isn't his only new programme.
On Monday (November 7, Living TV, 9pm) he stars in Derek Acorah's Ghost Towns where he heads to different areas in search of ordinary people's experiences with the paranormal.
The often chilling series lifts the lid on goings on across the nation and, with assistance of psychic believers Daniella Westbrook and Angus Purden, Derek will take to the road in the ghost truck to meet people, hear their stories and investigate the mysteries that have touched their lives.
"I have wanted to do a show like this for about 10 years and it's coming away from old castles and properties and looking instead at people's modern-day experiences," confesses Derek.
