 When Batman and Robin are climbing the side of a building, Colonel  Klink from Hogans Heroes pops his head out of a window and talks to  the Dynamic Duo. Its not only odd to have the heroes of this show  talking to a character from a different time period, but this was  one of the first times a taboo had been broken, namely using a guest  from a show on a rival network (Batman was shown on ABC TV and  Hogans Heroes on CBS TV). Batman even says, "Be sure to say hello  to Colonel Hogan from us."