Complex sentence: Wells would gain extra time with the completion of each task; however, it was later determined that regardless of what had unfolded, Wells would never have had enough time to complete the tasks to get the bomb defused.
Split into simpler sentences: Wells would gain extra time with the completion of each task. However, it was later determined that regardless of what had unfolded, Wells would never have had enough time to complete the tasks to get the bomb defused.