Any problems, you just call the Gene Genie.

Who: Sam Tyler, Gene Hunt, open
When: Immediately after Sam's arrival in 1984
Where: CID office
What: About to walk into Nelson's pub, he takes a look back and suddenly he's standing outside the doors to the CID office in 1984 with no memory of his decision to go to the pub.
Rating/Warnings: Language, most likely

( If I could stop time traveling, I'd really appreciate it )