diff --git a/gastronomy-cli/src/app.rs b/gastronomy-cli/src/app.rs
index 82aaa6b..bedc9eb 100644
--- a/gastronomy-cli/src/app.rs
+++ b/gastronomy-cli/src/app.rs
@@ -31,6 +31,7 @@ impl Default for Focus {
 #[derive(Default)]
 pub struct App<'a> {
     pub file_name: PathBuf,
+    pub index: Option<usize>,
     pub cursor: usize,
     pub frames: Vec<RawFrame<'a>>,
     pub source_files: BTreeMap<String, String>,
@@ -164,7 +165,7 @@ impl<'a> Widget for &mut App<'a> {
         let location = curr_frame.location;
         let ret_value = curr_frame.ret_value;
 
-        let layout = render_block_region(self.file_name.clone(), location, area, buf);
+        let layout = render_block_region(self.file_name.clone(), self.index, location, area, buf);
 
         let gauge_region = layout[0];
         let command_region = layout[1];
@@ -209,6 +210,7 @@ impl<'a> Widget for &mut App<'a> {
 
 fn render_block_region(
     file_name: PathBuf,
+    index: Option<usize>,
     location: Option<&String>,
     area: Rect,
     buf: &mut Buffer,
@@ -216,6 +218,7 @@ fn render_block_region(
     let title = Line::from(vec![
         " Gastronomy Debugger (".bold(),
         file_name.to_str().unwrap().bold(),
+        index.map(|i| format!(" #{i}")).unwrap_or_default().bold(),
         ")".bold(),
     ]);
     let mut instructions = if location.is_some() {
diff --git a/gastronomy-cli/src/main.rs b/gastronomy-cli/src/main.rs
index 378ae4b..37e4d71 100644
--- a/gastronomy-cli/src/main.rs
+++ b/gastronomy-cli/src/main.rs
@@ -1,6 +1,6 @@
 use std::{collections::BTreeMap, path::PathBuf};
 
-use anyhow::Result;
+use anyhow::{bail, Result};
 use app::App;
 use clap::{command, Parser, Subcommand};
 use figment::providers::Env;
@@ -58,6 +58,18 @@ async fn run() -> Result<(), anyhow::Error> {
             source_root,
         }) => {
             let mut raw_programs = gastronomy::uplc::load_programs_from_file(&file, query).await?;
+            let index = index.or(if raw_programs.len() == 1 {
+                None
+            } else {
+                Some(0)
+            });
+            if index.unwrap_or_default() >= raw_programs.len() {
+                bail!(
+                    "Invalid index #{}, tx only has {} redeemer(s)",
+                    index.unwrap_or_default(),
+                    raw_programs.len()
+                );
+            }
             let raw_program = raw_programs.remove(index.unwrap_or_default());
             let arguments = parameters
                 .iter()
@@ -80,6 +92,7 @@ async fn run() -> Result<(), anyhow::Error> {
             let mut terminal = utils::init()?;
             let mut app = App {
                 file_name: file,
+                index,
                 cursor: 0,
                 frames,
                 source_files,