NBC's Chicago Fire Episode Includes L Scenes

[chicagopcclcar]

As seen on the advertising clips, tonights episode of Chicago Fire on NBC at 2100 hours has scenes shot on the 'L'. Check it for continuity errors if any.

[jtrosario]

Signs. Same train is a 5000 with Purple LCD "LOOP", then becomes a Brown roll sign LOOP, then becomes a 5000 with Amber "LOOP" signs. Didn't get car numbers, anyone else?