In the Season 1 Emergency! episode titled "Hang-Up", the crew is watching the Season 4 Adam-12 episode "Ambush" prior to being called away, and part of the plot is John Gage finding out the ending of this episode. This episode features two Emergency! regulars: Marco López as an uncredited Sheriff's Deputy and Ron Pinkard as Officer Walt Barrett.
| Name | Type | Role | |
|---|---|---|---|
| Herb Purdum | Guest Star | ||
| Stephen J. Cannell | Guest Star | ||
| Christian Nyby | Director |