How is “follow on” used?

In The Dark Knight (2008), one line is: “I trust you don't have me followed on my day off.”

Which movie is “follow on” from?

The clip at the top of this page is from The Dark Knight (2008).

to go somewhere after sb else has gone there

Heard in 3 movies

1
to go somewhere after sb else has gone there
You go to the beach with the kids and I'll follow on when I've finished work.
2
to play a second innings (= a period during which a team is batting) immediately after its first, because it has failed to reach a particular score

Definitions from the Oxford Advanced Learner's Dictionary, 9th edition

I trust you don't have me followed on my day off.

Said in 8 films · #1