The Universal backlot features in a number of episodes featuring the detective in the distinctive mac, including the following:

• Requiem For A Falling Star: Season 2, Episode 5 (21 January 1973)
  Guest Star: Nora Chandler
• Fade in to Murder: Season 6, Episode 1 (10 October 1976)
  Guest Star: William Shatner
  The red studio trams can be seen as Columbo walks on the backlot. Jaws lake attraction is featured in a short scene.
• Murder, Smoke, and Shadows: Season 8, Episode 2 (27 February 1989)
  Guest Star: Fisher Stevens
• Murder With Too Many Notes: Special, 1999
  Guest Star: Billy Connolly

Links:

• Columbo Episode Guide
• The Ultimate Columbo Site
• Peter Falk official website