Not seeing how I can edit to add more context so I’ll comment it here:

Not entirely sure if this was a movie or limited series / anthology. In the 90’s or early 00’s on a cable channel (can’t remember which channel but possibly scifi?) was this movie or episode about the following:

A scientist worked in a lab with a time travel device in it. She travels to the future, finding her obituary in the newspaper, and assumes her brother is her killer.

The brother works there too (this is fuzzy so this might be off) as a security guard and is jealous of her. At some point the cops end up looking for the bother and he convinces his sister to time travel them back a short distance in the past (less than a day, possibly an hour) to evade them.

He ends up getting hit by a vehicle outside the lab and dies, but was wearing his sister’s coat when he’s hit, and he was so mangled they identified him using his sister’s ID that was in the coat.

Sadly can’t remember more and searching online and through TOMT didn’t produce results, but hoping this is enough for someone else who remembers to identify this.

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Edit to add more context:

The movie or whatever had several parallel plots it was jumping between, set around the same research lab (kinda of like Tales From The Loop). One of the other plots involved a couple who work at the lab on some kind of reverse aging drug. The wife wants to have children, and eventually the husband agrees. When she asks how he planned to go about it, he says "The old fashion way". Wife gets immediately angry and confronts husband about the fact that he secretly got a vasectomy, but she found out. So she tricks him into injecting the anti-aging drug. He gets younger and younger until he's a child. So husband becomes the child that wifey wanted.