Conductor (Big Top Scooby-Doo!)

The conductor ran the train carrying the Brancusi Circus.

Physical appearance
He has white hair and a mustache, and wears round glasses.

Personality
He is friendly but oblivious to the possibility of trouble on his train.

Big Top Scooby-Doo!
the gang tried to flag him down when a robbery was taking place on his train, but he thought they were just kids taking an interest, and he waved at them.

Appearances

 * DTV18. Big Top Scooby-Doo!