A bispecific antibody molecule comprising a first antigen binding domain which selectively binds to Receptor Tyrosine Kinase Like Orphan Receptor 1; and a second antigen binding domain which selectively binds to the CD3 subunit of the T-Cell Receptor; wherein the first antigen binding domain comprises a light chain variable domain and a heavy chain variable domain, wherein: (a) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 3 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 9; (b) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 4 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 10; (c) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 5 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 11; (d) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 6 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 12; (e) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 7 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 13; or (f) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 8 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 14. a second antigen binding domain which selectively binds to the CD3 subunit of the T-Cell Receptor; wherein the first antigen binding domain comprises a light chain variable domain and a heavy chain variable domain, wherein: (a) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 3 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 9; (b) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 4 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 10; (c) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 5 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 11; (d) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 6 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 12; (e) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 7 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 13; or (f) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 8 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 14. (a) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 3 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 9; (b) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 4 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 10; (c) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 5 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 11; (d) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 6 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 12; (e) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 7 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 13; or (f) the light chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 8 and the heavy chain variable domain comprises the amino acid sequence as set forth as SEQ ID NO: 14.