same bat-time, same bat-channel
at the end of the 1960s live-action (adam-west) batman tv show, an announcer would tease the
forthcoming episode (that resolved any cliffhangars) with the comment:
TUNE IN NEXT WEEK.
SAME BAT-TIME, SAME BAT-CHANNEL. nowadays it is used to affectionately tell someone that you will see them soon, particularly at a regular-time/place.