what happens to housemates
 

the night they are evicted?Like what do they have to be de-briefed about & stuff before they appear on BBBM that night?

They probably put them up in a half way house for a night to come down. Remind them of any legal obligations they signed up to before, to do with interviews etc...they probably can't slag off the behind the scenes people.

The housemate that wins pretty much has to do what Endemol says for a good fortnight after the end.

sounds a bit like the army then eh?

The select few, not just everyday members of society, facing rare challenges and harsh unforgiving conditions. Like the SAS....