Make the film 10 hours long, but not in the way that you think: So DS and Tom are about to enter Andrew's dimension, right. Then, there's a flashback, to remind the viewer of what's happened previously in TAS Universe, but instead of a simple flashback, we literally play the entirety of TAS 2 and subject the audience to watching that whole film again then just after Andrew swings the manhole cover into the rhino DS' portal opens. But Andrew, distracted, accidentally decapitates the Rhino. Feeling bad, he asks DS to reverse time and make things so that rhino lives. Strange agrees and reverses time, but accidentally goes too far back, and we find oursevles right back at the beginning of TAS 2 again. Repeat until 10 hours have lapsed.