From season 1 episode 1 "Uno". Jimmy McGill who is destined to become Saul Goodman (played by Bob Odenkirk) is at his brother's mailbox. His brother has a condition where electromagnetic radiation hurts him. Jimmy puts his electronic devices in the mailbox so as not to bring them close to his brother. This includes his red electronic keychain for his car. Which is the same exact same keychain that Walter White uses to operate his turret gun in the final episode of Breaking Bad. Coincidence from a lazy prop master or a clever call back?
