First part - Immersion and interaction
Secret cinema will recreate locations out of the movie and hire actors to play the characters out of the film but also for all the other smaller roles in the film, if you catch them at certain points they will re-enact parts of the movie, but you can also get involved with them and speak to them. There will be plots prepared for you to take part in with tasks you can get from the actors.
You will get around 2-3 hours to browse the buildings and interact with the characters that Secret cinema has organised. If you want to be a spectator that just looks at what others do then that's of course fine, but you will have the time of your life if you actually take part and pretend to be someone out of themed film.
My advice to anyone who is attending is to eat and drink before you reach the event, you don't want to waste time standing in queues to get food or drink during this magical first stage where you have the chance to really "live the movie".
I know the recent events are large and are attracting a lot of new participants, but I'd still want to say that I think out of respect to the other attendees you should make an effort to dress out and not to turn up in NIKE t-shirts or checkered shirts, floral dresses, it sort of spoils it for those people who made an effort.
Second part - Screening of the film
During the screening of the movie there will usually be some added visual effects and acting to accompany the movie. For example in Back to the future they had the Delorean driving up on stage and Biff and Marty fighting on stage.
Third part - The After party
Since you are in a place with a few hundred other people who dig the movie you just saw and you are all on a happy high, why not party with them? The after party will last until whatever venue they are at closes, for outdoor events it might not continue at all.
These are the three stages to a Secret Cinema event, though the concept has changed over the years.
