The Batcave was connected to Wayne Manor by a large staircase. However, Batman decided to improve this feature and built an elevator to connect both places. He also adapted a new secret entrance for the Batmobile. It had previously been located in an abandoned barn, but Batman changed it and switched the secret entrance to a hidden door on a mountain side, which was activated from the remote controls of the Batmobile.
Shortly after, Bruce installed a "Hot-Line" in the Batcave, which was a private phone connected between the cave and Commissioner Gordon's Office at the GCPD Headquarters. This feature largely replaced the Bat-Signal for some time during Batman's career.
- Season 5 / 1980 Shorts:
- Season 7 / 1983 Shorts:
- [7a] Attack of the Cats (October 22, 1983)
- Season 8:
- [7a] The Case of the Dreadful Dolls (October 22, 1984)
- As revealed in Batman, #164 (June, 1964).
- As revealed in Detective Comics, #328 (June, 1964).