diff --git a/numcosmo_py/app/catalog.py b/numcosmo_py/app/catalog.py
index 96f31640..b01bf8bc 100644
--- a/numcosmo_py/app/catalog.py
+++ b/numcosmo_py/app/catalog.py
@@ -26,6 +26,7 @@
 import math
 import dataclasses
 from typing import Optional, Annotated, List
+from pathlib import Path
 import typer
 from rich.table import Table
 from rich.text import Text
@@ -627,6 +628,35 @@ class PlotCorner(LoadCatalog):
         ),
     ] = 0
 
+    mcsample_only: Annotated[
+        bool,
+        typer.Option(
+            help="Generate only the MCSample object.",
+            hidden=True,
+        ),
+    ] = False
+
+    extra_experiment: Annotated[
+        Optional[list[Path]],
+        typer.Option(
+            help="Run extra experiment.",
+        ),
+    ] = None
+
+    extra_mcmc_file: Annotated[
+        Optional[list[Path]],
+        typer.Option(
+            help="Extra MCMC files.",
+        ),
+    ] = None
+
+    extra_burnin: Annotated[
+        Optional[list[int]],
+        typer.Option(
+            help="Extra burn-ins.",
+        ),
+    ] = None
+
     def __post_init__(self) -> None:
         """Corner plot of the catalog."""
         super().__post_init__()
@@ -635,7 +665,48 @@ def __post_init__(self) -> None:
         if self.plot_name is None:
             self.plot_name = str(self.mcmc_file)
         mcsample, _, _ = mcat_to_mcsamples(mcat, self.plot_name, indices=self.indices)
+        self.mcsample = mcsample
+
+        if self.mcsample_only:
+            self.end_experiment()
+            return
+
+        if self.extra_experiment is None:
+            self.extra_experiment = []
+        if self.extra_mcmc_file is None:
+            self.extra_mcmc_file = []
+        if self.extra_burnin is None:
+            self.extra_burnin = []
 
+        if len(self.extra_experiment) != len(self.extra_mcmc_file):
+            raise ValueError(
+                "Extra experiments and MCMC files must have the same length."
+            )
+        if len(self.extra_experiment) != len(self.extra_burnin):
+            raise ValueError(
+                "Extra experiments and burn-ins must have the same length."
+            )
+
+        mcsamples = [mcsample]
+        for extra_experiment, extra_mcmc_file, extra_burnin in zip(
+            self.extra_experiment, self.extra_mcmc_file, self.extra_burnin
+        ):
+            extra_exp = dataclasses.replace(
+                self,
+                experiment=extra_experiment,
+                mcmc_file=extra_mcmc_file,
+                burnin=extra_burnin,
+                log_file=None,
+                mcsample_only=True,
+                plot_name=None,
+            )
+            mcsamples.append(extra_exp.mcsample)
+
+        self.plot_mcsamples(mcsamples)
+
+    def plot_mcsamples(self, mcsamples: list[getdist.MCSamples]):
+        """Plot MCSamples."""
+        mcat = self.mcat
         set_rc_params_article(ncol=2)
         g = getdist.plots.get_subplot_plotter(
             width_inch=plt.rcParams["figure.figsize"][0]
@@ -645,7 +716,7 @@ def __post_init__(self) -> None:
         if self.mark_bestfit:
             bf = np.array(mcat.get_bestfit_row().dup_array())[1:]
         g.triangle_plot(
-            [mcsample], shaded=True, markers=bf, title_limit=self.title_limit
+            mcsamples, shaded=True, markers=bf, title_limit=self.title_limit
         )
 
         if self.output is not None: