A total of 3 hours and 35 minutes from the start of the HL/Eviction show to the end of BotS, but it's not quite all BB related stuff.
9 pm to 10 pm - CBB CH5
10 pm to 10:30 pm - Live Feed CH5* (there's usually a 15 min delay in LF, so we'll only get about 15 mins new material....if we're lucky!
11:10 pm to 11:35 pm - Evictee's Interview CH5
11:35 pm to 12:35 am - BotS CH5
So what are our options for the 'missing' time period?
Well....
Nothing matches up totally if you change to 5* for the live feed, after which you could watch Jedward's 'You have been framed' type programme - it finishes 10 minutes before The Interview comes on....
Or.... you could switch back to CH5 after the live feed and (10 minutes later) watch John Barrowman researching JR Ewing's side of the Dallas clan....
Or.... you could forget about the LF (I doubt you'll notice the difference! ), stay on CH5 and watch John Barrowman researching Bobby Ewing's branch of the Dallas clan, followed by him researching JR's side.