Movie Title Game: Before & After

a greeting card writer who still lives with his overbearing mother meets the woman of his dreams. Naturally, his mother objects to the relationship when she comes home to find his girlfriend in bed with another man.

An interstellar being travels a long way in search of water for his planet while a group of ladies enjoy the attention and affections of a different trio of interstellar travelers.

An overworked mother and her daughter do not get along. When they switch bodies, each is forced to adapt to the other's life as they encounter the mysterious Jason Voorhees and his deadly intentions.

The second title is a TV series.

When bitten by a genetically modified spider, a nerdy, shy, and awkward high school student gains spider-like abilities that he eventually must use to fight evil as a private investigator, assisted by Peggy Fair (whose cop-husband had been killed) and Police Department contact Tobias.

EDIT: It's been a full day now, so in accordance with my usual practice I'm going to put the answer under a spoiler cover.

The two titles are:

Spider-Man (2002)
Mannix

And so ... Spider-Mannix

Many ships have been lost at sea and a motley band of adventurers try to discover how, while a homicide detective struggles with a case and a aggressive woman he met via a newspaper ad.

An ethical defense lawyer disgusted with rampant legal corruption that goes all the way to the top is forced to defend a judge he hates in a rape trial, as two reporters shed light on all the scandals which compel the President of the US to resign.

Competing salesmen start a epic battle of one upmanship while 2 city workers try to discover who's dumping toxic waste.

A family make a living performing at small venues around the country while his kids dream of joining WWE. A phony psychic and her taxi driver boyfriend encounter a pair of serial kidnappers while trailing a missing heir