The intro uses the old logo.
Oliver and Laurel initially believe that the way to break the loop is to stop the bomb and track down the bomber, in a situation reminiscent of that seen in the movie Source Code (2011), which features a similar repeating scenario during which a man must discover a bomber's identity.
This episode is similar to the episodes of Here I Go Again (2018) and Cause and XS (2019). All three mention Groundhog Day (1993).