https://www.usatoday.com/story/life/tv/2018/08/21/how-fan-favorite-breaking-bad-character-wound-up-better-call-saul/1011285002/

In fact, the fan-favorite character was shooting another show in Albuquerque during Season 1 when he ran into co-creator Peter Gould, who said: "It'd be great to have you back."