The former Cheers star joined nine other celebrities, including Noel Gallagher's ex-wife Meg Matthews and actor Keith Allen, to spend a day living in six different eras of British history from the Iron Age to Medieval and Victorian times.

Alley played a servant in each time period and admits she struggled to cope with the living conditions, the corsets and the lack of food, electricity and modern toilets.

She tells Britain's newspaper The Sun, "There were moments when I thought I was going to throw a damned tantrum... I was on the verge of insanity a few times, especially in the Iron Age where there were no tools to do anything and hardly any food... I really didn't cope very well... Everybody was so gross, I didn't trust that anything was hygienic."

Alley booked into a luxury hotel when she finished filming, and the jump back to modern times felt strange, she adds, "It was like I had been a prisoner of war... I was back in society and everything was so loud... I had begun to accept and enjoy the sounds of nature and the quiet, so coming back to noise was hard. It drove me nuts for about a month."

Time Crashers airs in the U.K. from Sunday (23Aug15).