RecruitingPhase 1Drug trialA Study to Investigate CEA-PRIT 2.0 in Participants With Metastatic Colorectal Cancer (mCRC)This study will evaluate the dosimetry, safety, efficacy, pharmacokinetics (PK), pharmacodynamics and immunogenicity of CEA-PRIT 2.0 in participants with metastatic microsatellite-stable (MSS) mCRC who are intolerant to or have progressed after having received available standard-of-care (SOC) therapies.