For a film that's barely over an hour, "That Man's Here Again" takes a while to get off the ground, not entirely sure it's a comedy until the titular man, old Vaudevillian Hugh Herbert (known for his Daffy Duck-esque "Woo-hoo"s), gets involved to tie up the loose ends. Until then, the main reason I watched was for the extremely cute Australian actress Mary Maquire.
The plot is basically this: young Jimmy Whalen (all-American boy Tom Brown, who later turned up on "Gunsmoke") works as an elevator operator in the Park Avenue apartment house where Thomas Jesse (Herbert) comes in late & drunk every night. One cold & rainy night, Nancy Lee (Maquire) sneaks in, cold & wet, looking for shelter. She's been living on the streets, & Whalen finagles a job for her as a maid. The two fall in love, but Nancy's secret is that she a baby in state care. When Jimmy expresses his dislike of kids, & after Nancy breaks Thomas Jesse's valuable Ming vase, she disappears, & Jesse & Whalen have to conspire to not only get her back, but find a way for the young couple to live happily ever after (tm).
As I've said, this doesn't become comedic till the end, & there are really only a couple of good laughs in the film (one in a police station). The sitcom-y way it's all wrapped up might be forgiven if certain issues of the film found a decent resolution - the main one being, where's Nancy's baby's father?
All that being said, they really don't make them like this anymore, & Hugh Herbert is amusing to watch once the scene becomes his. This is strictly late-night, can't sleep fare, but, really, isn't that what all those classic movie channels are for anyway?