Red and Rover
They come in waves--five silent penultimate panels this Thursday.
Heart of the City by Mark Tatulli
Nancy by Guy and Brad Gilchrist
Pooch Cafe by Paul Gilligan
Red and Rover by Brian Basset
Sally Forth by Francesco Marciuliano and Craig Macintosh
Depending on your level of silent penultimate panel orthodoxy, Red and Rover may not count.
The silent double is not a true blank pause, but it is still long and dull. I say it counts. I made up the rules here, but I let them slide on a whim.