Ideas for Scenario: Rescue Time Slipping Agent

Hey everyone,

I was hoping you guys could point me to some ideas or a module that would be a good starting point for a mission idea I had. My cell of DG agents recently finished Reverberations pretty successfully. It took a couple sessions and one player had to drop out immediately after they had a bad trip with Reverb. I'm thinking I want to use that as a story prompt for their follow-on mission. He has slipped out of the normal time stream because of his bad trip and he needs to be rescued by the DG team. I already seeded the idea by having him send them hints and messages from the future and the past. (I'm thinking something akin to the beginning of Loki season 2.)

Do you guys have any DG stories you recommend I could use for inspiration or other DnD/RPG modules that do something like this?